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Explain why this statement is false: Ba is larger than Sr because the last electron added...

Explain why this statement is false: Ba is larger than Sr because the last electron added has a higher value of angular momentum quantum number (l).

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Answer #1

Ba is larger than Sr. this part is correct

But 2nd part makes the statement wrong

angular momentum quantum number (l) is 0 for both since electrons are added in s orbital for both.

This is the reason the statement is false

The correct reason for larger size of Ba is because of a greater shell in Ba

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