1) What symbol is potassium?  a) k b) p c) po d) ka 2) What element is NA?  a) nitrogen b) sodium  c) magnesium  d) phosphorus  3) What symbol is magnesium?  a) mg b) m c) mag d) ca 4) Which of these elements are in the first 20 elements? (can be more than 1 answer) a) potassium  b) gallium  c) Scandium  d) oxygen  e) iron  f) arsenic  5) What symbol is chlorine?   a) c b) cl c) ch d) k 6) How many elements are on the periodic table? a) 100 b) 110 c) 118 d) 115 7) Who made the periodic table? a) Dmitri Mendeleev b) Albert Einstein c) Isaac Newton d) Marie Curie

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