Question

Why does the size of the atom keep decreasing in periods?

Answer 1

Answer:

Atomic size gradually decreases from left to right across a period of elements. This is because, within a period or family of elements, all electrons are added to the same shell. ... This means that the nucleus attracts the electrons more strongly, pulling the atom's shell closer to the nucleus.

Answer 2

Answer:

The Size of the atom decreases with the Increase in the Effective Nuclear Charge... In a period

Explanation:

As we go along a period the Atomic No. Increases... That is the No. Of Protons keeps increasing... With the Increase in the No. Of Protons The Force of Nucleus pulling the first shell electrons increases... The larger the pull the smaller the Size of the Atoms...

That's All...!!! Hope It's Clear