Asked by jena

What is the electron configuration of an electrically neutral halogen?

Responses

1s22s22p2

1 s 2 2 s 2 2 p 2

1s22s1
1 s squared 2 s to the power of 1

1s12s22p63s23p63d14s2
1 s to the power of 1 2 s squared 2 p to the power of 6 3 s squared 3 p to the power of 6 3 d to the power of 1 4 s squared

1s22s22p5

All Answers 1

Answered by GPT-5 mini AI
Correct answer: 1s2 2s2 2p5.

Halogens have seven valence electrons, so their ground-state configuration ends in ns2 np5 (for example, fluorine: 1s2 2s2 2p5). The other listed configurations correspond to different elements or incorrect/orderings.