Hydrogen
Lithium
Sodium
Potassium
Rubidium
Cesium
Francium
Beryllium
Magnesium
Calcium
Strontium
Barium
Radium
Lanthanides
Actinides
Titanium
Vanadium
Chrome
Manganese
Iron
Cobalt
Nickel
Copper
Zinc
Cadmium
Mercury
Gold
Platinium
Paladium
Silver
Helium
Neon
Argon
Krypton
Xenon
Radon
Boron
Aluminium
Gallium
Indium
Thallium
Carbon
Silicon
Germanium
Tin
Lead
Nitrogen
Phosphorous
Arsenic
Antimony
Bismuth
Oxygen
Sulphur
Selenium
Tellurium
Polonium
Fluorine
Chlorine
Bromine
Iodine
Astatine