Write the number of periods the modern periodic table has. How do the valency and metallic character of elements vary on moving from left to right in a period? How do the valency and atomic size of elements vary down a group? (3)
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7 period s r there in modern periodic table
on moving from right in a period valency first increase and then decrease and metallic nature decrease s from left to right
on going down the group atomic size increase and valency remains same through out the group
hope this helps u friend
on moving from right in a period valency first increase and then decrease and metallic nature decrease s from left to right
on going down the group atomic size increase and valency remains same through out the group
hope this helps u friend
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