Question

Atomic size decreases along a period because ​

Answer 1

Answer:

Across a period, effective nuclear charge increases as electron shielding remains constant. A higher effective nuclear charge causes greater attractions to the electrons, pulling the electron cloud closer to the nucleus which results in a smaller atomic radius.

Explanation:

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Answer 2

Explanation:

On moving left to right across a period, the atomic radius decreases because the nuclear charge increases as the atomic number rises which makes the atom more compact.

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