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

Question

asked Jan 25, 2020 67.7k views

1 Answer

Tynese · Answer 1 · 2020-01-31T17:54:59+0000

Answer:

37 amu

Step-by-step explanation:

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

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