Period 2: Lithium, Beryllium -- Period 3: Sodium, Magnesium, Aluminium -- Period 4: Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium -- Period 5: Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin -- Period 6: Caesium, Barium, Lanthaninds (Lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium), Lutetium, Hafnium, Tantalum, Wolfram, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth -- Period 7: Francium, Radium, Actinides (Actinium, Thorium, Protactinium, Uranium). |