Question

Explain why the size of the atom increases down the group of perodic
table and decreased left to right in Period
pls give correct ans. of this question
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Answer 1

Answer:

as the atomic no increases no. of electrons increases hence size increases

Answer 2

when we go down the group no. of shell increases so the size is atom increases

but when we go left to right in a period no. of electron and no. of proton increases so the force of attraction increases which will result in decrease the size of the atom.