Question

difference between atomic size of elements in groups and periods ​

Answer 1

Answer:

in periods the size of atoms reduced as the siz if nucleus is increased its affect is more on th outer most electron of the atom ..in group siz of atom is increasing as electon going into new shell if neucleus increase

Answer 2

Answer:

As you move down a group or across a period, you will see a trend-like variation in the properties.

In periods:

1. The number of protons in the nucleus (called the nuclear charge).
2. The number of energy levels holding electrons (and the number of electrons in the outer energy level).
3. The number of electrons held between the nucleus and its outermost electrons (called the shielding effect).

In groups:

The size increases from top to bottom of the group due to the increase in the number of valance shell.