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Electronic Configuration

Atomic size d...

Question

Atomic size ___ down the group. (increases/decreases)

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Solution

Atomic size increases down a group and decreases along a period.

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Atomic size ___ down the group. (increases/decreases)

Q. As we go along the period the atomic size decreases.

Q. Assertion :The atomic size generally increases across a period and decreases down the group. Reason: Atomic size depends upon valence shell electronic configuration.

Q. Assertion :Atomic size decreases in a period due to increase of atomic number. Reason: The nuclear charge is increasing and size of valence shell remains same as we move from left to right. Hence, in any period, the atomic size of the element decreases from left to right.

The atomic size of an atom increases across the period and decreases down the group.

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