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12-05-2020
Physics

contestada

What is the mass number of a
neon isotope that has 9
neutrons? *

Respuesta :

12-05-2020

Neon is element #10, so every neon atom has 10 protons in the nucleus.

If it also has 9 neutrons in there, then its mass number is (10 + 9) = 19 .

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