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Diagram showing field lines and equipotentials around an electron, a negatively charged particle. In an electrically neutral atom, the number of electrons is equal to the number of protons (which are positively charged), resulting in a net zero overall charge. Charge is the fundamental property of forms of matter that exhibit electrostatic attraction or repulsion in the presence of other matter.
The answer is C. Electron. The electrons of an atom, in the electron cloud, are the only subatomic particles that have a negative charge. The neutron, which is in the nucleus, has no charge, so it is neutral. The proton, which is also in the nucles, has a positive charge. I hope this helps you out.