idk12345660 idk12345660

23-09-2020
Chemistry

contestada

If Argon has a mass number of 40 and an atomic number of 18, how many electrons does a
neutral atom contain?

A.40
B.20
C.22
D.18

Respuesta :

rebeccali45024571121 rebeccali45024571121

23-09-2020

C) 22 because the mass of a neutron is 1 amu and a proton is also 1 amu, so 40-18=22

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