Question

What is the periodic trend in the variation of atomic size while going left to right
within a period? Define atomic radius​

Answer 1

Answer:

Periodic Trend

The atomic radius of atoms generally decreases from left to right across a period. There are some small exceptions, such as the oxygen radius being slightly greater than the nitrogen radius. Within a period, protons are added to the nucleus as electrons are being added to the same principal energy level.

Explanation:

Answer 2

Answer:

Atomic Radius

The distance from the nucleus to the valence shell

Explanation:

the atomic radius decreases in period from left to right due to addition of electrons in the same shell