Hydrogen
H
phosphorus
P
Sulfur
S
chlorine
Cl
Argon
Ar
Potassium
K
Silicon
Si
aluminum
Al
magnesium
Mg
Sodium
Na
helium
He
lithium
Li
beryllium
Be
boron
B
carbon
C
nitrogen
N
oxygen
O
fluorine
F
neon
Ne
calcium
Ca
scandium
Sc
titanium
Ti
Vanadium
V
Chromium
Cr
Manganese
Mn
Iron
Fe
Cobalt
Co
Nickel
Ni
Copper
Cu
Zinc
Zn
Gallium
Ga
Germanium
Ge
Arsenic
As
Selenium
Se
Bromine
Br
Krypton
Kr
Rubidium
Rb
Strontium
Sr
Yttrium
Y
Zirconium
Zr
Niobium
Nb
Mollybdenum
Mo
Technetium
Tc
Ruthenium
Ru
Rhodium
Rh
Palladium
Pd
Silver
Ag
Indium
In
Tin
Sn
Cadmium
Cd
Antimony
Sb
Tellurium
Te
Iodine
I
Xenon
Xe
Cesium
Cs
Barium
Ba
Lanthanum
La
Cerium
Ce
Praseodymium
Pr
Neodymium
Nd