Elements with Atomic Number greater than 30 Helping students learn the chemical formula of common elements greater than 30 in the Periodic Table. Simple drag and drop exercise. Drag Chemical Symbols to their names Lead Tin Gold Silver Tungsten Platinum Uranium Americium Bromine Iodine Strontium Barium Francium Technetium Mercury Pb Sn Au Ag W Pt U Am Br I Sr Ba Fr Tc Hg