The following chemical equation is not balanced: i2 + na2s2o3 nai + na2s4o6 when this chemical equation is correctly balanced, what is the coefficient of the nai molecule? a. 1 b. 2 c. 3 d. 4

Diamond, graphite, and fullerenes share what property? a. they are all made of carbon (c) bonded to a metal. b. their shape. c. they are all made of carbon (c). d. they are all good conductors.

What effect does nuclear radiation have on atoms?

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.