Magnesium
Mg
Aluminum
Al
Silicon
Si
Phosphorus
P
Sulfur
S
Chlorine
Cl
Argon
Ar
Potassium
K
Calcium
Ca
Scandium
Sc
Titanium
Ti
Astatine
At
Selenium
Se
Bromine
Br
Krypton
Kr
Rubidium
Rb
Strontium
Sr
Cesium
Cs
Francium
Fr
Iodine
I
Xenon
Xe
Radon
Rn
Lead
Pb
Platinum
Pt