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| Q. |
What nucleus of atom contains? |
| A. | protons |
| B. | electrons |
| C. | electrons and protons |
| D. | protons and neutrons |
| Answer» D. protons and neutrons | |
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Explanation: The nucleus, that dense central core of the atom, contains both protons and neutrons. Electrons are outside the nucleus in energy levels. |
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