Question

11.What is meant by the term atomic size? How it will change an
moving down a group?
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Answer 1

Answer:

here is your answer

Explanation:

Atomic size is the distance between the center of nucleus and the outermost electron in the outer shell. Across a period from left to right there is decrease in atomic size with increase in nuclear charge of the element. Atomic size increases down the group because of addition of extra shell.

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Answer 2

Answer:

Atomic size is the distance between the center of nucleus and the outermost electron in the outer shell.

Atomic size increases down the group because of addition of extra shell.