An atomic mass unit is 1/12th of the mass of a 12 C atom. Key Takeaway. Atoms have a mass that is based largely on the number of protons and neutrons in their ... ... <看更多>

Both of you are right for 1.66∗10−27 kg=(6.02∗1026)−1 kg. NB: 1 amu=1/12 of 1 (one) C-12 atom mass (weight); 1 C-12 atom weight = 1.9926 x ... ... <看更多>

May 27, 2014 - Dalton = 1 atomic mass unit; 1 amu = 1.6605 x 10^-27 kg; each proton and neutron in a nucleus equals 1 amu. ... <看更多>