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NMAT Chemistry Practice Test

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An atom or a group of bonded atoms that carries an electrical charge is called?
Correct Answer:
Ion
Explanation:
Ion is the term for an atom or a group of bonded atoms that carries a net electric charge. This happens when there’s an unequal number of protons and electrons: losing electrons gives a positive charge, while gaining electrons gives a negative charge. Monoatomic ions are single atoms with a charge, like Na+ or Cl−, while polyatomic ions are groups of bonded atoms that together carry a charge, such as NH4+ or SO4^2−. In contrast, a neutral atom has no overall charge, and a molecule is typically a neutral group of atoms bonded together, though charged groups of atoms are described as ions.

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