Of the atoms (a) scandium, Sc; (b) calcium, Ca; and (c) lithium, Li, one tends to lose three electrons, another tends to lose two electrons, and another tends to lose one electron. Rank these atoms in order of the number of electrons they tend to lose, from fewest to most.

Rank the physical and chemical changes in order of decreasing of the amount of energy released: (a) the condensation of rain in a thunderstorm, (b) the burning of a gallon of gasoline in a car engine, (c) the explosion of a firecracker. What is the common name for oxygen oxide? How many carbon atoms are in a 4-carat pure diamond that has a mass of 0.80 g .