An ionic bond for calcium and oxygen is CaO. If an oxygen ion has a charge of two negative, what is the charge for calcium? +2 –1 +1 –2

What kind of ion is contained in salts that produce an acidic solution? a positive ion that attracts a proton from water a positive ion that releases a proton to water a negative ion that attracts a proton from water a negative ion that releases a proton to water

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

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.