2006-10-10 11:38:33 · 5 answers · asked by brown's_wifey33 1 in Education & Reference ➔ Homework Help
protons/electrons +neutrons
2006-10-10 11:40:15 · answer #1 · answered by raj 7 · 0⤊ 0⤋
It is indeed the sum of the number of the protons plus the neutrons. Electrons are not used to figure the mass since they are so small they 'hardly matter'.
Through in extra thins to dazzle your teacher. Protons have a mass of one, neutrons are slightly larger than one but are rounded to one for convenience. Electrons, too small at about 1/1836 th of a proton, so they are ignored.
Protons usually equal electrons in number.
To get the number of neutrons you subtract the Atomic No. (number of protons) from the Atomic Mass (the number of protons and neutrons)
Go get an "A".
2006-10-10 20:32:41 · answer #2 · answered by teachr 5 · 0⤊ 0⤋
atomic mass is equal to the number of protons and neutrons added together
2006-10-10 18:43:59 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The # of protons plus the # of neutrons. Let this be a best answer!
2006-10-10 18:43:57 · answer #4 · answered by Matt T 2 · 0⤊ 0⤋
protons
2006-10-10 18:42:52 · answer #5 · answered by ? 3 · 0⤊ 0⤋