The electronic configuration of chromium (Z = 24) isSelect an answerA [Ne]3s23p63d44s2 B [Ne]3s23p63d54s1 C [Ne]3s23p63d14s2 D [Ne]3s23p64s24s4
Question
The electronic configuration of chromium (Z = 24) isSelect an answerA [Ne]3s23p63d44s2 B [Ne]3s23p63d54s1 C [Ne]3s23p63d14s2 D [Ne]3s23p64s24s4
Solution
The electronic configuration of chromium (Z = 24) is [Ne]3s23p63d54s1. So, the correct answer is B [Ne]3s23p63d54s1.
Here's the step by step process:
- Chromium has 24 electrons.
- The first 10 electrons will fill up the 1s, 2s, and 2p orbitals, giving us the [Ne] core.
- The next 2 electrons will go into the 3s orbital.
- The next 6 electrons will go into the 3p orbital.
- The next 2 electrons will go into the 4s orbital.
- The next 5 electrons will go into the 3d orbital.
Normally, you would fill the 4s orbital before the 3d, but chromium is an exception because half-filled or completely filled sublevels are more stable than partially filled sublevels, so one electron from the 4s orbital is excited to the 3d orbital.
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