An atom of beryllium has 4 protons, 4 electrons, and 5 neutrons. What is its mass number?

asked Jan 26, 2021 207k views

4 votes

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4 votes

Answer:

40 is correct

Step-by-step explanation:

Hanane answered Jan 28, 2021

6.9k points

5 votes

Your answer should be 4.

Hope this helped!

-candycchandler

Mrtnmgs answered Jan 29, 2021

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