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Classification of Elements and Periodicity in Properties
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20/08/2021 12:16 pm
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Similarity in chemical properties of the atoms of elements in a group of the Periodic table is most closely related to:
(a) atomic numbers
(b) atomic masses
(c) number of principal energy levels
(d) number of valence electrons
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20/08/2021 12:19 pm
Correct answer: (a) atomic numbers
Explanation:
If elements are arranged in order of their increasing atomic numbers, element coming at intervals of 2, 8, 8, 18, 18, 32 and 32 will have similar physical and chemical properties and thus grouped in one particular group.