Explain why atomic number is always the number of protons and not the number of electrons in an atom?
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the atomic number describes how many protons there are in an atom's nucleus and the atomic mass is the total mass of all protons, neutrons and electrons. therefore,the mass of an electron is very small as to be relatively insignificant.
all the elements not have an equal number of protons and neutrons in their nucleus. examples are:-
1)hydrogen which only has one proton and no neutrons. It goes on from there and with a little research you can find several elements where the protons and neutrons aren't evenly balanced. Other examples are radioactive materials and isotopes.
all the elements not have an equal number of protons and neutrons in their nucleus. examples are:-
1)hydrogen which only has one proton and no neutrons. It goes on from there and with a little research you can find several elements where the protons and neutrons aren't evenly balanced. Other examples are radioactive materials and isotopes.
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Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.
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