how do you know how many neutrons are in an atom??

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how do you know how many neutrons are in an atom??

can anyone explan it 4 me

2007-03-04 16:44:20 · 3 answers · asked by Nini 1 in Science & Mathematics ➔ Chemistry

3 answers

Take the atomic weight and subtract the atomic number, you'll get a close estimate. Both protons and neutrons are about the same weight (well close anyway) and the atomic number gives you the number of protons.

2007-03-04 16:49:44 · answer #1 · answered by misoma5 7 · 0⤊ 0⤋

Find atomic mass using periodic table & subtract atomic no. Atomic no.=No. of protons,Atomic mass=no. of protons + no. of neutrons.

2007-03-04 18:55:22 · answer #2 · answered by RockRevel 1 · 0⤊ 0⤋

It would depend on what element you are talking about.

2007-03-04 16:54:07 · answer #3 · answered by Anonymous · 0⤊ 0⤋