What is the electron configuration of Br^-? A) 1s²2s²2p⁴ B) 1s²2s²2p⁶ C) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ D) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁵ E) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁴

Question

Quizplus · Accepted Answer

The electron configuration can be broken down by each element. 
- Br: 1s22s22p63s23p64s23d104p5
- S: 1s22s22p63s23p4
- U: 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p67s25f36d17s2
- P: 1s22s22p63s23p3

Putting it all together, we get:
1s2 2s2 2p6 3s2 3p6 [4s2 3d10 4p5] 3s2 3p4 [6s2 4f14 5d10 6p6] 4s2 3d10 4p6 [5s2 4d10 5p3]

However, there is an error in answer choice C. The final part of the electron configuration should be:
5s2 4d10 5p6 [6s2 4f14 5d10 6p6]

Therefore, the correct answer would be:
Answer: C
 1s2 2s2 2p6 3s2 3p6 [4s2 3d10 4p5] 3s2 3p4 [4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6]

What Is the Electron Configuration of Br-

What Is the Electron Configuration of Br^-