Question

how many groups and periods at therein the modern table? how do the atomic size and metallic character of elements vary as we move:
a.down a group
b.from left to right in a period​

Answer 1

Hey Mate Heres the ans ;

>There are 18 groups and 7 periods in the periodic table.

A) increases

B) decreases

HOPE IT HELPS YOU!

Answer 2

1. 18 group and 7 period. a. decrease & b. increase