portytytabby portytytabby

04-11-2016
Chemistry

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HELP
The atomic number of an atom identifies the number of protons in its nucleus.

If the overall charge on the atom is neutral, what must the atomic number also identify?

A.
the most common isotope's mass

B.
the average mass of all isotopes of the atom

C.
the number of electrons in the atom

D.
the number of neutrons in the atom

Respuesta :

04-11-2016

C.) The number of electrons in the atom.

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Edufirst Edufirst

05-11-2016

Answer: option C. the number of electrons in the atom.

Given that the charge of a proton is the same that the charge of an electron, to be neutral the number of protons has to be the same than the number of electrons.

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