Respuesta :

the ground state of the atom S (valence=2)
1s²2s²2p⁶3s²3p⁴

the excited state of the atom S (valence=4)
1s²2s²2p⁶3s²3p³3d¹

the excited state of the atom S (valence=6)
1s²2s²2p⁶3s¹3p³3d²