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H
Hydrogen
He
Helium
Li
Lithium
Be
Beryllium
B
Boron
C
Carbon
N
Nitrogen
O
Oxygen
F
Fluorine
Ne
Neon
Na
Sodium
Mg
Magnesium
Al
Aluminum
Si
Silicon
P
Phosphorus
S
Sulfur
Cl
Chlorine
Ar
Argon
K
Potassium
Ca
Calcium
Sc
Scandium
Ti
Titanium
V
Vanadium
Cr
Chromium
Mn
Manganese
Fe
Iron
Co
Cobalt
Ni
Nickel
Cu
Copper
Zn
Zinc
Ga (not needed)
Gallium (not needed)
Ge (not needed)
Germanium (not needed)
As
Arsenic
Se (not needed)
Selenium (not needed)
Br
Bromine
Kr
Krypton
Rb
Rubidium
Sr
Strontium
47: Ag
Silver
50: Sn
Tin
53: I
Iodine
54: Xe
Xenon
55: Cs
Caesium
56: Ba
Barium
74: W
Tungsten
78: Pt
Platinum