emilytaylorr8 emilytaylorr8

15-09-2020
Chemistry

contestada

what is the mass number of an atom or ion with one proton, two neutrons, and one electron?

Respuesta :

fixitfavour fixitfavour

20-09-2020

Answer:

3

Explanation:

mass no.=protons+neutrons

mass no.=1+2=3

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