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What is the mass number of an element with atomic number 18 and 17 neutrons?

lforbes21

wrote...

Posts: 23

Rep:

11 years ago

What is the mass number of an element with atomic number 18 and 17 neutrons?

What is the mass number of an element with
atomic number 18 and 17 neutrons?

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1 Reply

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bug2012

wrote...

#1

11 years ago

atomic mass is protons plus neutrons (all in the nucleus)

atomic number is the number of protons (or electrons) in an atom

so mass = 18+17 = 35

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