JEE Main 2014 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties JEE Main 2014

Similarity in chemical properties of the atoms of elements in a group of the Periodic table is most closely related to:

(1)atomic numbers
(2)atomic masses
(3)number of principal energy levels
(4)number of valence electronsCorrect

Answer: (4)

Solution

Chemical behaviour is governed by the outermost electrons, and all members of a group share the same valence-shell configuration — that is what makes their

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Question ID VK-104559