how-many-valence-electrons-does-arsenic-have

Arsenic has 5 .

It’s is ##1s^2## ##2s^2## ##2p^6## ##3s^2## ##3p^6## ##3d^10## ##4s^2## ##4p^3##. It’s outermost shell (4s and 4p) has 5 electrons, these are the .

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