An atom with 4 protons, 5 neutrons, and 4 electrons has an atomic mass of _____ amu. (Enter a whole number.) Numerical Answers Expected! Answer for Blank 1:

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Beryllium - Atom Mass: 9

The atomic mass is 9 amu.

Given that,

  • An atom with 4 protons, 5 neutrons, and 4 electrons.

Based on the above information, the calculation is as follows:

Atomic mass = Protons + neutrons  

= 4 protons + 5 neutrons

= 9

Therefore we can conclude that the atomic mass is 9 amu.

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