the ones that are taken
Hydrogen
Helium
Lithium
Beryllium
Boron
Carbon
Nitrogen
Oxygen
Fluorine
Neon
Magnesium
Phosphorus
Potassium
Bromine
Yttrium
Rhodium
Silver
Indium
Xenon
Promethium
Tungsten
Rhenium
Osmium
Iridium (mistake)
Platinum
Gold
Mercury
Lead
Polonium
Radon
Radium
Uranium
Neptunium
Plutonium
Americium
Nihonium