Question

How many groups and periods are there in the Modern Periodic Table? How do the atomic size

and metallic character of elements vary as we move: (i) down a group and (ii) from left to right

in a period

Answer 1

There are three periods in the periodic table
1.Medieval period
2.modern peiod

Answer 2

18 groups!!!!!!!! 7 periods!!!!! UP TO down atomic radius increases left to right decreases metallic character increases on moving left to right please tag as brainliest!!!!!!