Question

ICSE CHEMISTRY -How does the number of valence electrons and valency vary on moving from left to right: (a) in the first period of the periodic table, and (b) in the second period of the periodic table?
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Answer 1

Answer:

(i) The number of valence electrons increases from 1 to 2 in the 1st period of the periodic table.

(ii) The valence electrons increase from 1 to 8 in the 2nd period of the periodic table.

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