4 electroni pe ultimul strat
ns2 np2 => 2p ↑ ↑ => 2e-
7 electroni pe ultimul strat
ns2 np5 => 2p ↑↓ ↑↓ ↑ => 1e-
5 electroni pe ultimul strat
ns2 np3 => 2p ↑ ↑ ↑ => 3e-
8 electroni pe ultimulstrat
ns2 np6 => 2p ↑↓ ↑↓ ↑↓ => 0e-
4 electroni total
ns2 np2 => 2p ↑ ↑ => 2e-
7 electroni total
ns2 np5 => 2p ↑↓ ↑↓ ↑ => 1e-
5 electroni total
ns2 np1 => 2p ↑ => 1e-
8 electroni total
ns2 np4 => 2p ↑↓ ↑ ↑ => 2e-
