0707sandersd 0707sandersd

17-11-2020
Chemistry

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

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teyoncej27442 teyoncej27442

17-11-2020

Answer:

40 is correct

Explanation:

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candycchandler candycchandler

17-11-2020

Your answer should be 4.

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-candycchandler

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