Answer:
the newspaper one is a chemical change because the chemicals in the paper have reacted with something and turned a different color. the wax one is a physical change because it is a change in the phase of matter, which is always a physical change (still the same substance chemically)
For a single atom, the charge is the number of protons minus the number of electrons
The original options for this question were cleavage, luster and hardness. The answer would be cleavage.
