Question

. The elements of second period of the periodic table are given below-

Li, Be, B, C, N, O, F

Explain why atomic radius decreases from Li to F?

Identify most metallic and non- metallic element.​

Answer 1

1)We know that the atomic radius decreases from left to right in a period because more electrons are being gradually added in the valence shell.No new shell is formed. As the no. Of protons also increases the electrons experienced more attraction towards the nucleus.As a result, the atomic radii reduces from left to right.

2)Li-Most metallic
F- Mosr non- metallic