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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.
A: An atom with no charge becomes positively charged when it loses an electron. When this happens, it is called a positive ion. If the atom gains an electron, the atom becomes a negative ion. In either case, the number of protons in the atomâs nucleus does not change. More than one electron can be removed from an atom to give it a positive charge of +2, +3 or more. Continue Reading