What is the electron configuration of Cr 3+?

Question

What is the electron configuration of Cr 3+?

1 Answer

Impact of this question

160932 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-11-30T18:16:49

$C r^{3 +} : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{0} 3 d^{3}$ $Cr^(3+):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(color(red)(0))3d^(color(red)(3))$

Explanation:

The atomic number of Chromium is $Z = 24$ $Z=24$ , therefore a $C r$ $Cr$ atom possesses $24$ $24$ electrons.

$C r : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{1} 3 d^{5}$ $Cr:1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)3d^(5)$

Note that it is $4 s^{1} 3 d^{5}$ $4s^(1)3d^(5)$ and not $4 s^{2} 3 d^{4}$ $4s^(2)3d^(4)$ because a half filled $d$ $d$ orbital is more stable than a partially filled $d$ $d$ orbital.

However, the chromium ion $C r^{3 +}$ $Cr^(3+)$ possesses $24 e^{-} - 3 e^{-} = 21 e^{-}$ $24e^(-)-3e^(-)=21e^(-)$ due to the loss of $3$ $3$ of its electrons.

Thus, the electron configuration of $C r^{3 +}$ $Cr^(3+)$ is:
$C r^{3 +} : 1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{0} 3 d^{3}$ $Cr^(3+):1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(color(red)(0))3d^(color(red)(3))$

Science

Math

Humanities

... and beyond

What is the electron configuration of Cr 3+?

1 Answer

Explanation:

Related questions

Impact of this question