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Which of the following statement is not ...

Which of the following statement is not correct about the electronic configuration of chromium atom `(Cr` with atomic number `= 24)`?

A

It has five electrons in `3d` - sub -shell

B

It has one electrons in 4s-orbital

C

The principal quantum numbers of its valence electrons are 3 and 4

D

It has siz electrons in 3d -sub-shell

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The correct Answer is:
D
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