RudleyMillia RudleyMillia

12-10-2016
Chemistry

contestada

What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass of 39?
a. 19
b.20
c.39
d.58

Respuesta :

olabido olabido

18-06-2018

20 because
mass no=electrons+neutrons
so to find neutrons
mass no-electrons=neutron

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