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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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micro micro
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11 years ago
What is the atomic number of an atom with 83 p and 128 n?
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wrote...
#1
11 years ago
83
wrote...
#2
11 years ago
easy!

atomic number is the # of protons.

83
wrote...
#3
11 years ago
its 83 since the atomic number is the number of electrons it has and there is the same number of protons and electrons in a atom.  so since there is 83 protons it means there is 83 electrons.  which makes the atomic number 83.  

Hope this helps!
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#4
11 years ago
83 -- the amount of protons is the atomic number and the amount of electrons is the same as the amount of protons. When there're more neutrons than protons or electrons it's called an isotope.
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