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

asked Aug 15, 2017 215k views

3 votes

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

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4 votes

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

Speeder answered Aug 20, 2017

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