Question

why it is decrease across the period and incress down the prat​

Answer 1

Answer:

Atomic radius is the distance from the atom's nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant. ... This results in a larger atomic radius.

Answer 2

Answer:

Here's the ans hope it's helpful for you☺

Explanation:

Atomic radius is the distance from the atom's nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.This results in a larger atomic radius.

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