The number of electrons in the valence shell of a halogen is?
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0
Answer:
seven valence electrons
The halogens all have the general electron configuration ns 2 np 5 , giving them seven valence electrons. They are one electron short of having the full outer s and p sublevel, which makes them very reactive.
Answered by
0
Answer:
7
Explanation:
the valence electrons in halogens in the last shell is seven, and the valency us -1, that is, the electron can gain one electron
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