magnesium - Mg potassium - K phosphorus - P chromium - Cr uranium - U aluminum - Al helium - He calcium - Ca fluorine - F nickel - Ni lead - Pb iron - Fe copper - Cu carbon - C nitrogen - N silicon - Si sodium - Na lithium - Li sulfur - S iodine - I gold - Au bromine - Br chlorine - Cl hydrogen - H mercury - Hg neon - Ne silver - Ag oxygen - 0 tin - Sn zinc - Zn