kelly2403 kelly2403

16-09-2019
Chemistry

contestada

what is the mass number of element in an atom that has 20 protons and 17 neutrons?

Respuesta :

pranav109503 pranav109503

16-09-2019

Answer:

37 amu

Explanation:

Why: mass number is the number of protons + the number of neutrons. 20+17=37

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