Periodic table themed crossword puzzle with answer key. Crossword clues are the element abbreviations. Includes phosphorus, carbon, bromine, titanium, argon, lead, chlorine, uranium, barium, radon, zinc, selenium, fluorine, nickel, copper, potassium, hydrogen, nitrogen, helium, iodine, mercury, sulfur, magnesium, gold, silver, oxygen, tin, calcium, sodium, lithium, neon, and iron.Fun game to learn about and review common elements and their abbreviations in the classroom. Perfect for fourth, fift