Fractional-N
Full Member level 1
Hi,
1u,The unified atomic mass unit, is defined to be: "one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state"(from wikipedia.org)
OK, so C12 has 6 protons, 6 neutrons, and 6 electrons. so:
6 * 1.672621777e-27(mass of proton) + 6 * 1.674927351e-27(mass of neutron) + 6 * 9.10938291e-31(mass of electron) = 2.009076039e-26
Now, 1u is equal to 1.660538921e-27(Kg)
and calculating the mass of C12 this way gives: 1.660538921e-27 * 12 = 1.9926467052e-26
Why the two calculations didn't give the same result?
1u,The unified atomic mass unit, is defined to be: "one twelfth of the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state"(from wikipedia.org)
OK, so C12 has 6 protons, 6 neutrons, and 6 electrons. so:
6 * 1.672621777e-27(mass of proton) + 6 * 1.674927351e-27(mass of neutron) + 6 * 9.10938291e-31(mass of electron) = 2.009076039e-26
Now, 1u is equal to 1.660538921e-27(Kg)
and calculating the mass of C12 this way gives: 1.660538921e-27 * 12 = 1.9926467052e-26
Why the two calculations didn't give the same result?