H
hydrogen
Li
lithium
Na
sodium
K
potassium
Be
beryllium
Mg
magnesium
Ca
calcium
Sc
scandium
Ti
titanium
V
vanadium
Cr
chromium
Mn
manganese
Fe
iron
Co
cobalt
Ni
nickel
Cu
copper
Zn
zinc
B
boron
Al
aluminium
Ga
gallium
C
carbon
Si
silicon
Ge
germanium
N
nitrogen
P
phosphorus
As
arsenic
O
oxygen
S
sulfur
Se
selenium
F
fluoride
Cl
chlorine
Br
bromine
He
helium
Ne
neon
Ar
argon
Kr
krypton