Hvis dette element er i periode 3, er dens valenselektronkonfiguration?
Period 3 element
Kemisk grundstof
Kemisk serie
Elektronkonfiguration


11
Na
Natrium
Alkalimetal
[Ne] 3s1


12
Mg
Magnesium
Alkalisk jordmetal
[Ne] 3s2


13
Al
Aluminium
Metal efter overgangen
[Ne] 3s2 3p1


14
Si
Silicium
Metalloid
[Ne] 3s2 3p2


15
P
Phosphor
Reaktivt ikke-metal
[Ne] 3s2 3p3


16
S
Svovl
Reaktivt ikke-metal
[Ne] 3s2 3p4


17
Cl
Klor
Reaktivt ikke-metal
[Ne] 3s2 3p5


18
Ar
Argon
Ædelgas
[Ne] 3s2 3p6
Period 3 element
Chemical element
Chemical series
Electron configuration


11
Na
Sodium
Alkali metal
[Ne] 3s1


12
Mg
Magnesium
Alkaline earth metal
[Ne] 3s2


13
Al
Aluminium
Post-transition metal
[Ne] 3s2 3p1


14
Si
Silicon
Metalloid
[Ne] 3s2 3p2


15
P
Phosphorus
Reactive nonmetal
[Ne] 3s2 3p3


16
S
Sulfur
Reactive nonmetal
[Ne] 3s2 3p4


17
Cl
Chlorine
Reactive nonmetal
[Ne] 3s2 3p5


18
Ar
Argon
Noble gas
[Ne] 3s2 3p6
Period 3 element