Question

the 3p subshell of an atom contains 2 electrons. find it's atomic number?
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Answer 1

Answer:

The atomic number of chromium = 24.

The electronic configuration in the ground state is

Cr (Z = 24) = 1s2, 2s2 2p6 3s2 3p6 4s1 3d5.

The electronic configuration of cr3+ is

cr3+ = 1s2, 2s2 2p6 3s2 3p6 4s0 3d3.

There are three unpaired electrons present in the 3d subshell.

The number of unpaired electrons in Cr3+ ions is = 3.

Explanation:

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