calcium
Ba
Br
chloor
Al
ijzer
fosfor
aluminium
Cu
barium
B
jood
kalium
helium
I
kobalt
F
beryllium
goud
Co
boor
Ar
fluor
chroom
P
C
Be
koper
Cl
Cr
Au
Ca
koolstof
Cd
K
He
Fe
argon
broom
cadmium
