Q.

Out of neutrons and protons, ____ are slightly heavier.

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Detailed Solution

Out of neutrons and protons, neutrons are slightly heavier.
All atoms except hydrogen contain neutrons in their nucleus. Unlike protons and electrons, neutrons do not contain any charge or they are electrically neutral. Its mass is slightly greater than proton. The mass of a proton is 1.0078 amu whereas for neutrons, it is 1.0087 amu.
 
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