Question

The atomic radius of elements decreases along the period but Neon has highest size among III period element? Why

Answer 1

This is because Neon (Ne) is the only element in the periodic table with a Vander walls radius whereas the other elements of the periodic table possess a covalent radius.

Why does atomic radius decrease along the period from left to right?

• The atomic radius in a period decreases from left to right in a period because the atomic number increases across the period.
• This is because all the coming electrons add up in the same shell of the element and no new shell is created.
• Due to positive nuclear force, the electrons get attracted toward the center and the overall size reduces.

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