An atom contains one proton one electron and one neutron Which two particles are most similar in mass?
the neutron and the electron
the proton and the electron
the proton and the neutron
the neutron and the atom
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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

What three things does a balanced equation show you?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?