Posted inunclassified Chemistry: Periodic Table Volume 1 Posted by By Agodirin October 1, 2024 Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 3 1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950 Created by Agodirin Chemistry: Periodic Table Vol 1 1 / 50 1. period_21_An element with atomic number 17 resembles which of the following elements? A) 19 B) 33 C) 35 D) 18 The elements chlorine (Cl) with atomic number 17 and bromine (Br) with atomic number 35 both belong to Group 17 of the periodic table. Group 17 elements are also known as the halogens. They share similar chemical properties because they have the same number of electrons in their outermost shell, which is 7 2 / 50 2. period_25_Which of the following is not correct about halogens A) they combine with other elements to form halides B) they occupy group VII of the periodic table C) flourine is more reactive than iodine D) their reactivity increased down the group The halogens occupy Group VII of the periodic table: This statement is correct. Halogens are in Group 17 (Group VIIA in older notations) of the periodic table. They combine with other elements to form halides: This statement is correct. Halogens readily combine with other elements to form halides (e.g., NaCl, KBr). Their reactivity increases down the group: This statement is incorrect. The reactivity of halogens actually decreases down the group. Fluorine is the most reactive, followed by chlorine, bromine, and iodine. Fluorine is more reactive than iodine: This statement is correct. Fluorine is indeed more reactive than iodine. 3 / 50 3. period_4_Which of the following is not correct about the periodic table A) Group 2 are alkaline-earth metals B) Group 1 are alkali metals C) Group 5 are halogens D) Group 8 are noble elements Group 7 are halogens 4 / 50 4. period_2_Which of the following is not correct about the periodic table A) the element in group 1 are noble gases B) the elements in group 8 are inert and rare gases C) the group of the element corresponds to the number of valence electrons D) the group of the element corresponds to the number of electrons in the outermost shell Group 1 consists of alkali metals (such as lithium, sodium, and potassium), which are highly reactive. Noble gases are found in Group 18 (or Group 8A), and they are characterized by their lack of reactivity due to having a complete outer shell of electrons. 5 / 50 5. period_37_Which of the following is not correct about the group one elements of the periodic table. A) They are vary reactive in air and water hence they are stored under oil or paraffin B) They have low density and low melting point C) They are poor conductors D) They form ions by losing one electron The incorrect statement is: “They are poor conductors.” Correct Statements: They are very reactive in air and water hence they are stored under oil or paraffin: This is true. Group 1 elements (alkali metals) are highly reactive, especially with air and water, and are typically stored under oil or paraffin to prevent reactions. They have low density and low melting point: This is true. Alkali metals generally have low densities and low melting points compared to other metals. They form ions by losing one electron: This is true. Alkali metals have one electron in their outermost shell, which they readily lose to form +1 ions. 6 / 50 6. period_5_Which of the following is not correct about the periodic table A) the vertical columns correspond to the group of the elements B) The valence electron is in the innermost shell C) atoms of elements in same period have the same number of electron shells D) elements in the same horizontal row are in same period the valence electrons are actually located in the outermost shell of an atom, not the innermost shell. Valence electrons are crucial for determining an element's chemical properties and reactivity. In contrast, the innermost shell contains core electrons, which do not participate in bonding 7 / 50 7. period_18_Which of the following elements has the highest ionization energy? A) flourine B) calcium C) chlorine D) magnesium Ionization energy generally increases across a period, and fluorine, being at the rightmost side of Period 2, has the highest ionization energy among the options 8 / 50 8. period_7_Which elements belong to the third period of the periodic table? A) Na, P, O and Cl B) B, C, N and O C) Na, Mg, S and Ar D) Li, Be, Al and P The third period consists of sodium (Na), magnesium (Mg), aluminum (Al), silicon (Si), phosphorus (P), sulfur (S), chlorine (Cl), and argon (Ar).The third period of the periodic table includes the elements sodium (Na), magnesium (Mg), sulfur (S), and argon (Ar). 9 / 50 9. period_17_An atom of element X has the electronic configuration of 1s² 2s² 2p⁶ 3s² 3p³. In which group of the periodic table is element X found? A) 4 B) 0 C) 5 D) 2 The configuration shows that element X has 5 valence electrons, placing it in Group 5 of the periodic table 10 / 50 10. period_22_Electrons enter into orbitals in order of increasing energy as exemplified by: A) 1s² 2s² 2p² 2p² 3s¹ B) 1s² 2s² 2p² 2p² 3s² C) 1s² 2s² 2p² 1 2p³ 1s² D) 1s² 2s² 2p¹ 2p¹ 2p¹ 3s¹ This notation correctly follows the Aufbau principle, indicating the filling of orbitals in order of increasing energy 11 / 50 11. period_30_Elements which loose electron to convert to ions are A) conductors B) semiconductors C) metals D) nonmetals Metals are characterized by their ability to lose electrons easily. This is because they have relatively low ionization energies, meaning that it requires less energy to remove an electron from their outer shell. · When metals lose electrons, they form positively charged ions (cations). For example, sodium (Na) loses one electron to become Na⁺, and magnesium (Mg) can lose two electrons to become Mg²⁺. · This tendency to lose electrons is a key property of metals, making them good conductors of electricity and heat 12 / 50 12. period_48_Which of the following is not correct about elements in the periodic table A) The atomic volume of elements in the periodic table increases down the group B) The ionization energy reduces from group 1 to zero on the periodic table C) The atomic radius of elements increase down the group with the atomic number D) The atomic volume of elements in the periodic table reduces from group 1 to group 0 Atomic Radius: The atomic radius actually tends to decrease across a period (left to right) due to the increased nuclear charge pulling electrons closer to the nucleus. Down a Group: The atomic radius increases down a group because additional electron shells are added, increasing the distance from the nucleus despite increased nuclear charge. Ionization Energy: Generally increases across a period due to stronger attraction from the nucleus 13 / 50 13. period_47_Which of the following is not correct about the maximun number of electrons each subshell of an orbit can accommodate? A) d-holds 10 electrons B) f-holds 14 electrons C) p-holds 6 electrons D) s- holds 4 elecrons s subshell: Can hold a maximum of 2 electrons. p subshell: Can hold a maximum of 6 electrons. d subshell: Can hold a maximum of 10 electrons. f subshell: Can hold a maximum of 14 electrons 14 / 50 14. period_23_Which of the following is not correct about the relationships of elements in the same group of the periodic table A) elements in group I,II and III are metals B) in group I metals, the reactivity increased down the group C) element in same group have same valency D) elements in group IV ,V and VI are metalloids Elements in groups IV, V, and VI are metalloids. Explanation: This statement is incorrect. While group IV does contain metalloids (like silicon and germanium), groups V and VI primarily contain nonmetals (like nitrogen and oxygen) and also some metalloids (like arsenic and tellurium). Thus, not all elements in groups V and VI are metalloids 15 / 50 15. period_1_Which of the following is not correct about the periodic table A) Elements in same group have the same number of valence electrons B) the elements in the same vertical column form a group C) the elements are arranged in order of increasing atomic number D) there are 9 main groups of elements The periodic table is typically divided into 18 groups, not 9. Each group contains elements with similar chemical properties and the same number of valence electrons. 16 / 50 16. period_28_Which of the following describes the diagonal relationships in the periodic table A) the diagonal relationship is between elements in same group B) elements in diagonal relationship are in two adjacent groups C) the diagonal relationship is between the first member of the group and the third member of the next groupp D) the diagonal relationship is between elements in same period This means that elements in a diagonal relationship are not in the same group or period but are positioned diagonally across two adjacent groups and periods. For example, lithium (Li) in Group 1 and Period 2 has a diagonal relationship with magnesium (Mg) in Group 2 and Period 3. the diagonal relationship is between one member of one group and the member of the next group in the period below the period of the member of the first group. The diagonal relationship in the periodic table is indeed between one member of one group and the member of the next group in the period below. This relationship highlights the similarities in properties between these diagonally adjacent elements. 17 / 50 17. period_3_which of the following is not correct about the elements in group 8 of periodic table A) they have 8 electrons in the outermost shell B) they are noble gases C) they are rare elements D) there are highly reactive Elements in Group 8, known as noble gases (such as helium, neon, and argon), are characterized by their lack of reactivity due to having a complete octet of electrons in their outer shell. This makes them very stable and unreactive under normal conditions. 18 / 50 18. period_44_which of the following is the configuration system for numbering the shells of an atom from the inner to the outer shell A) K,L, M, N B) K,N,O,P C) S,P,D,F D) I,J,K,L In atomic structure, the shells are designated using the letters: K for the first shell (n = 1), L for the second shell (n = 2), M for the third shell (n = 3). N for the fourth shell (n = 4) 19 / 50 19. period_16_Which transition metal is not attracted to an external magnetic field? A) Ti B) Fe C) Cu D) Zn Copper (Cu) is diamagnetic, meaning it is not attracted to a magnetic field. In contrast, iron (Fe) and titanium (Ti) are paramagnetic, and zinc (Zn) is also diamagnetic but less commonly noted in this context 20 / 50 20. period_6_Chlorine, bromine, and iodine resemble one another in that they: A) are liquids B) dissolve in alkali C) react violently with hydrogen without heating D) displace one another from solutions of their salts Chlorine, bromine, and iodine are halogens and can displace each other in reactions with their salts due to their similar reactivity. 21 / 50 21. period_40_Which of the following is not correct about the elements in group three of the periodic table A) They are less reactive than groups one and two elements B) The most commonly encountered element is boron C) They are soft metals D) They react less vigorously with water Boron is indeed a well-known element in group three, primarily due to its use in various applications (like glass and ceramics). However, when considering the most commonly encountered element in daily life, aluminum is more prevalent due to its extensive use in packaging, construction, and transportation 22 / 50 22. period_29_Which of the following is correct about elements in diagonal relationship of the periodic table A) they are in same period B) they have similar chemical characteristics C) they are in same group D) they have similar physical characteristics Elements in a diagonal relationship, such as lithium (Li) and magnesium (Mg), or beryllium (Be) and aluminum (Al), exhibit similar chemical properties due to their comparable atomic and ionic sizes, electronegativities, and ionization energies. They are not in the same group or period but are positioned diagonally across two adjacent groups and periods. 23 / 50 23. period_46_The number of electrons in each shell (n) of an atom is give by the formula A) 2n2 B) 3(n/2) C) 2n/2 D) 2n-2 The formula 2n² provides the maximum number of electrons that can occupy a shell with principal quantum number n. · Here’s how it works: For n = 1 (the first shell), the maximum number of electrons is 2(1²) = 2. For n = 2 (the second shell), the maximum number of electrons is 2(2²) = 8. For n = 3 (the third shell), the maximum number of electrons is 2(3²) = 18. For n = 4 (the fourth shell), the maximum number of electrons is 2(4²) = 32. · This formula is derived from the fact that each shell can contain a certain number of sub-shells, and each sub-shell can hold a specific number of electrons based on its type (s, p, d, f) 24 / 50 24. period_15_Beryllium and aluminum exhibit similar properties because they: A) belong to the same period B) are both metals C) are positioned diagonally to each other D) belong to the same group Beryllium and aluminum are not in the same group but share similar properties due to their diagonal relationship in the periodic table 25 / 50 25. period_32_A new element “KR” was just discovered in Nigeria. The element has the following properites. It melts at 35oC, it does not conduct electricity , and the chemical reaction was as shown below. Kr + e = Kr-. Which of the following is not correct about the substance A) The element is likely a nonmetal B) the element is likely to sonorous C) the element is an oxidizing agent D) the element is likely to have low density the new element is likely a non metal because of the low melting point, being an insulator and also the chemical reaction show that it receives electron hence it is an oxidizign agent and its likely to have low density. It is likely to be nonsonorous 26 / 50 26. period_14_To correct the electrochemical series of K, Na, Ca, Al, Mg, Zn, Fe, Pb, H, Cu, Hg, Ag, Au, which elements should be interchanged? A) Zn and Pb B) Al and Mg C) Zn and Fe D) Pb and H This interchange would correctly reflect their reactivity in the electrochemical series. 27 / 50 27. period_10_Elements in the same period of the periodic table have the same: A) same atomic number B) same physical properties C) same number fo shells D) same valency Elements in the same period have the same number of electron shells. 28 / 50 28. period_9_The stability of noble gases is due to: A) have duplet or octet electron configurations B) belong to group zero of the periodic table C) have no electrons in their outermost shells D) are volatile in nature Noble gases are stable because they have complete outer electron shells, either with 2 electrons (duplet) or 8 electrons (octet), making them chemically inert. 29 / 50 29. period_33_What is the difference between chemical properties of metals and nonmetals A) Metals are reducing agents and nonmetals are oxidizing agents B) Non metals can displace hydrogen ions from acid easily C) Metals tend to form ionic compounds D) Non-metals tend to form covalent bonds Nonmetals generally do not displace hydrogen ions from acids. This property is more characteristic of metals, particularly those that are more reactive than hydrogen, like zinc or magnesium. 30 / 50 30. period_34_Which of the following is not correct about the periodic table A) elements in the same group have the same valencey B) elements are arranged in order of increasing atomic number C) elements are arranged in order of decreasing number of protons D) elements in same group have similar chemical properties Elements are arranged in order of decreasing number of protons. Incorrect: The periodic table is actually arranged in order of increasing atomic number, which corresponds to the number of protons in the nucleus of an atom. Therefore, this statement is not correct. Elements are arranged in order of increasing atomic number. Correct: This statement is accurate. The periodic table is organized by increasing atomic number (the number of protons). Elements in the same group have the same valency. Correct: Elements in the same group (vertical columns) typically have the same number of valence electrons, which determines their valency. Elements in the same group have similar chemical properties. Correct: This is true as well. Elements in the same group often exhibit similar chemical behaviors due to their comparable valence electron configurations. 31 / 50 31. period_39_Which of the following is the most commonly encountered element of the group three of the periodic table A) Gallium B) Thallium C) Aluminium D) Boron Aluminium is widely used in various applications, including construction, packaging, transportation, and cookware, making it the most prevalent and commonly encountered element in everyday life from group three. Boron is important in specific applications (like glass and ceramics) but is not as commonly encountered as aluminum. · Gallium is used in electronics and some specialized applications but is less common in daily life. · Thallium is toxic and not commonly encountered compared to the others 32 / 50 32. period_49_Which of the following is not correct about the electron configuration A) The arrangement of the electrons of an atom does not affect the physical properties B) The nearer the shell is to the nucleus, the lower the energy in the shell C) The inner electronic shells are are filled before the outer shells D) The arrangement of the electons of an atom determine the chemical properties the electron configuration affect the physical and chemical properties of an atom 33 / 50 33. period_19_Group VII elements in their combined states are called: A) Halides B) halogen C) anion D) cation Group VII elements (halogens) form compounds called halides when they combine with other elements 34 / 50 34. period_36_Which of the following is not correct about the group oen elements in the periodic table A) They react with cold water to liberate hydrogen B) They are alkali metals C) They dissolve in water to form strong alkali D) They have a valency of two The incorrect statement is: “They have a valency of two.” Correct Statements: They are alkali metals: This is true. Group 1 elements are known as alkali metals. They dissolve in water to form strong alkali: This is true. Alkali metals react with water to form strong alkaline solutions (e.g., sodium hydroxide). They react with cold water to liberate hydrogen: This is true. Alkali metals react vigorously with cold water, producing hydrogen gas. Incorrect Statement: They have a valency of two: This is false. Group 1 elements have a valency of one, as they have one electron in their outermost shell which they readily lose to form +1 ions. 35 / 50 35. period_13_If an element X has 127 neutrons and 82 electrons, what is its atomic number? A) 45 B) 82 C) 105 D) 209 The atomic number is equal to the number of protons, which is the same as the number of electrons in a neutral atom. Therefore, the atomic number is 82. 36 / 50 36. period_26_which of the following is not correct about the periods or horizontal rows in the periodic table A) the matallic property increases from left to right B) metalloids are in the middle of the period C) elements in group II are more metalic than element in group VI D) each period starts with an alkali metal and ends with a noble gas The metallic property increases from left to right:This statement is incorrect. The metallic property actually decreases from left to right across a period. Elements on the left are more metallic, while those on the right are more non-metallic. Elements in Group II are more metallic than elements in Group VI: This statement is correct. Group II elements (alkaline earth metals) are more metallic than Group VI elements (halcogens). Each period starts with an alkali metal and ends with a noble gas: This statement is correct. Each period begins with an alkali metal (Group I) and ends with a noble gas (Group 18 or group 8 or group 0). Metalloids are in the middle of the period: This statement is correct. Metalloids are typically found in the middle of the periods, between the metals on the left and the non-metals on the right. 37 / 50 37. period_8_The general rise in the first ionization energy as you move from left to right across a period can be attributed to: A) decrease in nuclear charge B) increase in nuclear charges C) decrease in screening effect D) increase in screening effect As you move from left to right across a period, the nuclear charge increases, which attracts the electrons more strongly, making it harder to remove an electron (higher ionization energy). 38 / 50 38. period_11_Which noble gas is known for its high power of fog penetration, used in aerodrome beacons? A) argon B) neon C) helium D) krypton Krypton is effective in lighting applications, particularly in foggy conditions, which is why it is used in aerodrome beacons. 39 / 50 39. period_43_which of the following is not correct about the trasnsition elements A) they are used as catalysts B) their valency varies C) they are all nonmetals D) they use electrons in their two outer electrons for chemical combination Transition elements are all metals 40 / 50 40. period_12_What is the correct order of decreasing activity among the metals Fe, Ca, Al, and Na? A) Al > Fe > Na > Ca B) Fe > Ca > Al > Na C) Na > Ca > Al > Fe D) Ca > Na > Fe > Al Sodium is the most reactive metal listed, followed by calcium, aluminum, and iron, which is the least reactive. The correct order of decreasing reactivity is Na > Ca > Al > Fe, based on their positions in the reactivity series. 41 / 50 41. period_38_Which of the following is not correct about the elements in group two of the periodic table A) They are called alkali earth metals B) They are more reactive than group 1 elements C) They have two electrons in their outermost shell D) They react with steam to form alkali and release hydrogen they are less reactive because they have two electrons to loose hence requiring more energy than group one elements that need less energy to lose one electron. The higher the valency the less reactive the element 42 / 50 42. period_41_Which of the followinig is not true about the elements in group seven of the periodic table A) Examples are sodium, boron and flourine B) They have seven valence electrons C) They are called halogens D) They ionize by gaining one electron Group VII Elements: are called the halogens. They are fluorine, chlorine, bromine and iodine.They are non-metals. They have seven electrons in their outermost shell and ionize by gain of one electron 43 / 50 43. period_24_Which of the following is not correct about the relationships of elements in the same group of the periodic table A) elements in group VII are a halides B) elements in group V and VII are non-metals C) elements in group IV are metalloids D) elements in group VIII or 0 are noble gases the are halogens, its their compounds that are halides 44 / 50 44. period_42_Which of the following is not correct about the elements in group Zero of the periodic table A) They are called noble elements B) They are highly reactive nonmetals C) Examples are helium, argon and neon D) They have completely filled outer shell Group O Elements are the inert gases or noble gases or rare gases. They are: Helium, Argon, Neon, Krypton, Xenon and Radon. They are inert or highly unreactive because they have their. outer shell completely filled with electrons. 45 / 50 45. period_27_An element which as atomic number of 11 is likely to have similar chemical properities with another element having atomic number A) 7 B) 19 C) 18 D) 9 An element with an atomic number of 11 is sodium (Na). Sodium is an alkali metal, which means it is in Group 1 of the periodic table. The element most likely to have similar chemical properties to sodium is potassium (K), which has an atomic number of 19. Both sodium and potassium are in the same group (Group 1) and share the following characteristics: Highly Reactive: Both react vigorously with water to form hydroxides and release hydrogen gas. Soft Metals: They are soft and can be cut with a knife. Low Melting Points: They have relatively low melting points compared to other metals. Form +1 Ions: Both elements lose one electron to form cations with a +1 charge. Elements with atomic numbers 7 (nitrogen), 9 (fluorine), and 18 (argon) belong to different groups and have different chemical properties compared to sodium. Both elements belong to Group 1 (alkali metals) in the periodic table, which means they exhibit similar reactivity and form similar types of compounds. They both have only one electron in their outermost shell 46 / 50 46. period_45_Each orbital shell around the nucleus of an atom has sub-shells that are number as A) s,p,d,f B) k,n,o,p C) a,b,c,d D) k,l, m,n The orbital shells are designated by the principal quantum number n (where n = 1, 2, 3, ...). The sub-shells within these shells are labeled using letters. · The labels for the shells are traditionally referred to as: k for n = 1 l for n = 2 m for n = 3 and n for n = 4 47 / 50 47. period_31_Elements which gain electrons to convert to ions are A) semiconductors B) conductors C) metals D) nonmetals Nonmetals tend to gain electrons to achieve a full outer electron shell, which usually corresponds to the stable electron configuration of the nearest noble gas. They have higher electron affinities compared to metals. When nonmetals gain electrons, they form negatively charged ions (anions). For instance, chlorine (Cl) gains one electron to become Cl⁻, and oxygen (O) gains two electrons to form O²⁻. This behavior is crucial for chemical bonding, particularly in ionic compounds, where nonmetals typically bond with metals. 48 / 50 48. period_20_What is the most abundant rare gas in the atmosphere? A) Ar B) Xe C) He D) Ne Argon is the most abundant noble gas in the Earth's atmosphere, making up about 1% of the air we breathe. 49 / 50 49. period_50_The electron configuration of an atom with atomic number of seven is A) 1s2, 2d2, 2p3 B) 1s2, 2d2, 2f3 C) 1s2, 2s2, 2s3 D) 1s2, 2s2, 2p3 The electron configuration of an atom with atomic number seven is: 1s², 2s², 2p³. Explanation: The atomic number 7 corresponds to nitrogen. The electron configuration is determined by filling the orbitals in the following order: The first two electrons fill the 1s orbital: 1s².The next two electrons fill the 2s orbital: 2s².The remaining three electrons occupy the 2p orbital: 2p³ 50 / 50 50. period_35_which of the following isnot correct about the period or horizontal row of the periodic table A) the atomic number reduces by one when going from left to right B) the electron radius reduces when going from left to right C) the elements in same period have same number of electron shells D) the ionization energy increases when going from left to right The incorrect statement is: “The atomic number reduces by one when going from left to right.” Correct Statements:The elements in the same period have the same number of electron shells: This is true. All elements in a given period have electrons filling the same principal energy level. The ionization energy increases when going from left to right: This is true. As you move across a period, the ionization energy generally increases due to the increasing nuclear charge.The electron radius reduces when going from left to right: This is true. The atomic radius generally decreases across a period because the increasing nuclear charge pulls the electrons closer to the nucleus. Incorrect Statement: The atomic number reduces by one when going from left to right: This is false. The atomic number actually increases by one as you move from left to right across a period. Your score is LinkedIn Facebook Twitter VKontakte Restart quiz Thank you Send feedback Share via: Facebook X (Twitter) LinkedIn More Agodirin View All Posts Post navigation Previous Post Chemistry: Structure of AtomsNext PostChemistry: Structure of atoms Vol2