What happens to an ionic compound when it is dissolved in water? a: the electrons are combined with the water molecules

b: the ions combine and conduct electricity

c: the ions separate and conduct electricity

d:liquid crystals are formed

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth