How I can Demonstrate the atomic mass is approximately equal the number of protons + the number of neutrons ?

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How I can Demonstrate the atomic mass is approximately equal the number of protons + the number of neutrons ?

2007-03-08 07:07:49 · 4 answers · asked by aam a 1 in Science & Mathematics ➔ Chemistry

4 answers

because it is only the protons and neutrons that are inside the nucleus of an atom

2007-03-08 07:13:41 · answer #1 · answered by Newbody 4 · 0⤊ 0⤋

Protons and neutrons have an AMU of 1 while electrons are negligible. Take the atomic mass and subtract the atomic number(which equals the # of protons) and this will give you the number of neutrons.

2007-03-08 15:16:02 · answer #2 · answered by ajbairdo 1 · 0⤊ 0⤋

If your needing to know the wieghts in thousands of protons, you will need to consider electron wieght.

2007-03-08 15:13:36 · answer #3 · answered by Anonymous · 0⤊ 1⤋

Use this

http://www.webelements.com/

2007-03-08 15:13:55 · answer #4 · answered by occluderx 4 · 0⤊ 0⤋