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

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

asked
User Lscoughlin
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2 Answers

4 votes

Answer:

40 is correct

Step-by-step explanation:

answered
User Hanane
by
8.0k points
5 votes

Your answer should be 4.

Hope this helped!

-candycchandler

answered
User Mrtnmgs
by
8.7k points
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