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If Beryllium has a mass number of 7 and atomic number of 4, how many protons does it have?
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If Beryllium has a mass number of 7 and atomic number of 4, how many protons does it have?

User Linquize
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6 votes

Answer:

4

Step-by-step explanation:

So the atomic number is still the proton number and it is always smaller than the atomic mass so the proton number is 4.

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User Rizza
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4 votes

Answer:

4

Step-by-step explanation:

User Geoff Johnson
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