Which conclusion could be made from Ernest Rutherford’s gold foil experiment? Atoms are made up of mostly empty space. Atoms are mainly solid and block alpha particles. The volume of the nucleus is large compared to the rest of the atom. The mass of the nucleus is small compared to the rest of the atom.

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.