Quote:
Originally Posted by seamonkey
Atomic number isn't mentioned. The numbers CM mentioned are the nucleon number and the mass number (which are the same thing.) The mass number is different than the atomic mass which is annoying. The atomic mass is what megadog was trying to write an equation for, but failed due to counting too many neutrons.
The correct equation of atomic mass of carbon is (Pmass*6 + Nmass*(12  6, 13  6, 14  6))
Some of what I wrote down is a restatement of hyperme's post, but was slightly confusing so I rewrote it.

Thanks, it's been a while since I did this so I forgot A) That nucleons are both and B) that the number is the number of nucleons, not neutrons.