The electronic configuration of a sulfur atom is $1s^2 2s^2 2p^6 3s^2 3p^4$. In one sulfur atom, how many electrons are in the valence shell, and how many electrons are unpaired?
- Avalence shell electrons: $2$, unpaired electrons: $1$
- Bvalence shell electrons: $4$, unpaired electrons: $2$
- Cvalence shell electrons: $6$, unpaired electrons: $0$
- Dvalence shell electrons: $6$, unpaired electrons: $2$