Atom A has 8 protons, 9 neutrons, and 10 electrons. What is the atomic mass of atom A?
Does anyone know this answer/how to calculate atomic mass?? Thanks!
2006-12-08 12:16:28 · 3 answers · asked by lalamaso 1 in Science & Mathematics ➔ Physics
you can calculate the mass number which is the sum of protons and neutrons, so it is 8+9=17. The mass of electrons are negligible.
But you ask for atomic mass which is usually the weighted average of all isotopes...
2006-12-08 12:20:36 · answer #1 · answered by Math-Chem-Physics Teacher 3 · 2⤊ 0⤋
Atomic mass = #protons + #neutrons.
Thereore, Atom A has atomic mass of 8 + 9 = 17
2006-12-08 12:19:27 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Go to www.wikipedia.org and look up the mass of an electron, the mass of a proton and the mass of a neutron.
(proton mass x 8)+(neutron mass x 9)+(electron mass x 10) = the answer.
2006-12-08 12:56:29 · answer #3 · answered by Mez 6 · 0⤊ 0⤋