Which of the following statement is not correct P about the electro...

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Which of the following statement is not correct
P about the electronic configuration of chromium

W atom \( (\mathrm{Cr} \) with atomic number \( =24) \) ?
(1) It has five electrons in \( 3 \mathrm{~d} \)-sub-shell
(2) It has one electrons in 3 s-orbital
(3) The principal quantum numbers of its valence electrons are 3 and 4.
(4) None of these
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