Question

what is atomic radius and will it increase or decrease from left to right in periodic table?​

Answer 1

Answer:

Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons. True, electrons are also added as the elements move from left to right across a period, but these electrons reside in the same energy shell and do not offer increased shielding.

Answer 2

Answer: So...

(1). Atomic radius is nothing but the distance of the outermost shell of an         element containing electrons from the nucleus of the element.

(2). Atomic radius will decrease from left to right as the electrons are added in the same shell and, in the nucleus the number of protons are also increasing.

As the number of electrons are increasing, the nuclear charge will also increase...this charge attracts electrons and helps them to get pulled by the nucleus.

Hope this answer helps you.

Explanation: