Question

atomic radius increases down the group. give reason

Answer 1

This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smallerradius.Atomic radius increases from top to bottom within a group. This is caused by electron shielding.

Answer 2

the atomic size increases down the group this is because new shells are added as we go down the group. this increases the distance between the outermost electrons and the nuclear so that the atomic size increases in spite of the increase in nuclear charge