When dissolved in water, an acid or a base breaks down into a proton and an electron. two negative ions. a positive and a negative ion. a positive ion and a proton.

a positive and a negative ion

Explanation:

When an acid dissolves in water, it produces positive hydrogen [H⁺] or hydronium [H₃O⁺] ions.

When a base dissolves in water, it produces negative hydroxide [OH⁻] ions.

Hope this helps.

got c

Explanation:

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.