protons
neutrons
electrons
positrons
2006-10-30 06:08:07 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Physics
neutrons.....atoms of the same element with different atomic masses are called isotopes
2006-10-30 06:11:06 · answer #1 · answered by The Cheminator 5 · 0⤊ 0⤋
atoms of the same element are refered to as isotopes and they differ only in the number of neutrons in the nucleus.
If the number of protons changes, then it is no longer the same element.
Atoms don't have positrons.
Electrons is a bit tricker answer, because the same atom may have different number of electrons depending on the chemical compound it is in... But I would stick with neutrons.
2006-10-30 15:53:34 · answer #2 · answered by Leonardo D 3 · 0⤊ 0⤋
Neutrons. The number of protons defines an element, thus it cannot change. Since electronsn have negligible mass, the answer is neutrons. We call these atoms with different numbers of neutrons isotopes.
2006-10-30 14:10:07 · answer #3 · answered by Doug k 3 · 2⤊ 0⤋
Neutrons
2006-10-30 14:14:59 · answer #4 · answered by bldudas 4 · 0⤊ 0⤋
Neutrons. Same element=same # of protons & electrons. You won't have positrons, & they have very little mass anyhow.
2006-10-30 14:11:34 · answer #5 · answered by yupchagee 7 · 0⤊ 0⤋
Are you too lazy to do your study?
Neutrons.
I was going to say electrons, thinking of isotopes. But above and below this answer, they got it right at first try. Of course the neutrons have the significant mass, in comparison to the electrons.
2006-10-30 14:11:06 · answer #6 · answered by Anonymous · 0⤊ 2⤋
Doug K is right
2006-10-30 14:11:28 · answer #7 · answered by funandsun20 3 · 0⤊ 0⤋