Question #3ca57

1 Answer
Professor Sam
Apr 21, 2017

Because Na atom has extra electron

Explanation:

When we are talking of a #Na^+# ion we are talking of a #Na# atom with 1 less electron
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while an Na atom has

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an extra electron which is the only one present in its last accessible orbital thus covering more space.If you think it as a circle.consider nucleus as the center of the circle

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Whereas in Na atom

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