1) Which molecule represents H2O? a) b) c) d) e) 2) Which molecule represents N2? a) b) c) d) e) 3) How many atoms of OXYGEN atoms are in this formula? a) 3 b) 2 c) 1 4) How many atoms of C? a) 2 b) 3 c) 1 d) 4 5) How many protons, neutrons and electrons are in a hydrogen atom? a) b) c) 6) How many protons, neutrons and electrons are in a helium atom? a) b) c) d) 7) How many atoms of HYDROGEN are found in water? a) 2 b) 3 c) 1 8) In an atom, the number electrons is the same as the number of a) protons b) neutrons 9) In an atom of Carbon, the number of protons is a) 6 b) 12 c) 18 10) In an atom of Carbon, the number of ELECTRONS is a) 6 b) 12 c) 18 11) In an atom of Carbon, the number of NEUTRONS is a) 6 b) 12 c) 18

Stucture of Matter (Atoms and Molecules)

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