Which of the following statements about ionic bonding is true?

Question

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Ionic bonding is a type of chemical bonding that involves two oppositely charged ions. The atoms are held together by the electrostatic attraction generated by the opposite charges.
Ionic bonding will occur only if the overall energy change for the reaction is favorable. In general, the reaction is exothermic, which means that they release heat as they occur.
Ions are atoms that have gained one or more electrons (known as anions, which are negatively charged) and atoms that have lost one or more electrons (known as cations, which are positively charged).

Which of the Following Statements About Ionic Bonding Is True