Question

Write the trends in the periodic table with respect to number of valence electrons,

valency, atomic radius, metallic and non-metallic character (a) along the period and

(b) Down the group​

Answer 1

Answer:

In a period, the number of valence electrons increases as we move from left to right side. However, in a group this periodic trend is constant, that is the number of valence electrons remains the same.

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Period Group 1 Group 2

3 B(11) F(12)

4 C(19) G(20)

5 D(37) H(38)

Explanation:

Answer 2

In a period, the number of valence electrons increases (mostly for light metal/elements) as we move from left to right side. However, in a group this periodic trend is constant, that is the number of valence electrons remains the same.