Write the ground-state electron configuration of Sb. A)[Kr]4d⁸5s¹5p³ B)[Kr]4d⁵5s¹5p⁶ C)[Kr]4d¹⁰5p² D)[Kr]4d¹⁰5s²5p³ E)[Kr]4d¹⁰5s²

Question

Quizplus · Accepted Answer

The electron configuration of Sb is [Kr]4d10 5s2 5p3. 
To write it in a more condensed form, we can replace the [Kr] configuration (which represents the 36 electrons in Kr's configuration) with the noble gas shorthand notation of Kr. 
This gives us [Kr]4d10 5s2 5p3. 
We can rearrange this to group the subshells in order of increasing energy level: 
[Kr] 4d10 5p3 5s2 
Finally, we can abbreviate this as [Kr]4d10 5p3, which is choice D.

Write the Ground-State Electron Configuration of Sb