Which statement about acids is true? a) Weak acids have a pH of less than 2.
b) The pH value of acids can only be measured in aqueous form.
c) The stronger the acid, the higher the pH value.
d) Strong acids have a low percent ionization.

When electrons are removed from the outermost shell of a calcium atom, the atom becomes an anion that has a larger radius than the atom. an anion that has a smaller radius than the atom. a cation that has a larger radius than the atom. a cation that has a smaller radius than the atom.