qween53 qween53

10-09-2017
Chemistry

contestada

If an atom has 34 protons and 40 neutrons, what is its mass number? 40 6 74 34

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Palmetto18 Palmetto18

10-09-2017

Protons+Neutrons
34+40= 74

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tsaafiy tsaafiy

05-10-2018

The answer is 74

The mass equals the number protons and neutrons.

34+40= 74

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