Question

Why atomic size decreases from left to right in a period and increases down a group ???
please I m in confusion give a better explanation, I will mark brainliest answer.​

Answer 1

Answer:

hey frnd

Explanation:

the reason is if u go from left to right atomic size decrease becoz effective nuclear attraction means no of valence electrons increases and as electrons increses the nucleus attract more it towards it so size decreases where as in group there are less valence electrons so not much attraction. hope it helps uuuuu........

Answer 2

Explanation:

Atomic size gradually decreases from left to right accross a period of elements. This is because ,within a period or family of elements , all elements are added to the same shell. The valence electrons are held closer toward the nucleus of the atom. As a result , the atomic size decreases.

Atomic size increases to a group due to increase in the number of protons and electrons across a period.

Hope this will help you frnd.....!!!