also how is the mass number diffrent from the average atomic mass
2007-02-11 12:20:46 · 4 answers · asked by ititit3 2 in Science & Mathematics ➔ Physics
An element is determine by the number of protons.
Mass number is the number of protons+neutrons
For most elements the number of neutrons can vary (isotopes) for example carbon 12 is the most common but carbon 14 also exist in nature.
The average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element.
2007-02-11 12:52:11 · answer #1 · answered by meg 7 · 0⤊ 0⤋
The mass number of an atom is = to the number of protons + the number of neutrons.
2007-02-11 20:27:34 · answer #2 · answered by Anonymous · 0⤊ 0⤋
is the one on the corner of the periodic table, it's the mass of the protons, plus the neutrons; usually it's about twice the atomic number, but could be exceptions, for example in H(hydrogen, #1) it's about 1 because it doesn't have any neutrons
2007-02-11 20:30:37 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The mass number of an atom is the number of protons and nutrons. Not sure about the second part of your question. Sorry.
2007-02-11 20:30:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋