A) one-twelfth the mass of one carbon-12 atom
B) the mass of one electron
C) one-sixth the mass of one helium-4 atom
D) the mass of one carbon-12 atom
A) one-twelfth the mass of one carbon-12 atom
B) the mass of one electron
C) one-sixth the mass of one helium-4 atom
D) the mass of one carbon-12 atom