User:Drnybble/Books/Chemical Elements-4

Period 5

 * Elements
 * Caesium
 * Barium
 * Hafnium
 * Tantalum
 * Tungsten
 * Rhenium
 * Osmium
 * Iridium
 * Platinum
 * Gold
 * Mercury (element)
 * Thallium
 * Lead
 * Bismuth
 * Polonium
 * Astatine
 * Radon