An ionic bond is formed when:

the combining atoms gain electrons

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the combining atoms lose electrons

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a metallic element reacts with a nonmetallic element

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two metallic elements react

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Solution

The correct option is C a metallic element reacts with a nonmetallic element
Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

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