Neutrons have mass approximately equal to that of _____________ atoms?
Correct answer: A. Hydrogen
- A. Hydrogen
- B. Helium
- C. Deuterium
- D. None of these
Explanation
A neutron has a mass of about 1 atomic mass unit, nearly equal to the mass of a hydrogen atom. A deuterium atom contains a proton and a neutron, so its mass is approximately twice as large.
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