Question

why does atomic size decreases when we move across the period?​

Answer 1

Answer:

Atomic radius decreases across a period because valence electrons are being added to the same energy level at the same time the nucleus is increasing in protons. The increase in nuclear charge attracts the electrons more strongly, pulling them closer to the nucleus.

plsss mark my answer as the brainliest plsssss....

Answer 2

Answer:

When we move across the period the nucleus of the atom holds more protons, so its nuclear force of attraction towards the electrons present in the shells increases. As a result, the electrons are pulled more closer to the nucleus so the atomic size seems to decrease across the period.