The Mass Number of an Atom Is Equal to _____

question 136

Multiple Choice

The mass number of an atom is equal to _____.

• A) the sum of the number of neutrons and the number of electrons per atom.
• B) the atomic mass of an element.
• C) the atomic number of an element.
• D) the sum of the number of protons and the number of neutrons per atom.
• E) None of the above

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