If the atomic number of an element is 7 and its mass number is 18, how many neutrons are in the atom's nucleus?

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07-04-2017
Chemistry

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If the atomic number of an element is 7 and its mass number is 18, how many neutrons are in the atom's nucleus?

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Invisibread Invisibread · Answer 1 · 2017-04-08T00:33:29+02:00

Invisibread Invisibread

08-04-2017

To find neutrons, you locate the atomic mass and round it off, then locate the atomic number and subtract the two. So here you'd have 18 - 7, leaving you with 11 neutrons. Protons and electrons are equal to the atomic number.

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