Why does the size of the atom of elements increases down a group and decreases when you move across?

Question

Chemistry

Yareli

13 March, 03:51

Why does the size of the atom of elements increases down a group and decreases when you move across?

+1

Answers (1)

Know the Answer?

Janae Harvey · Answer 1

This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smaller radius. Atomic radius increases from top to bottom within a group.