The Mass of a Helium Nucleus Is Slightly Less Than

question 20

Multiple Choice

The mass of a helium nucleus is slightly less than the sum of its parts (2 protons and 2 neutrons) because

• A)some of the mass is converted to binding energy.
• B)some of the mass is given to electrons.
• C)the mass of protons and neutrons are not precisely known.
• D)the mass of a proton is larger than the mass of a neutron.

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