What is a covalent bond?

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When two nonmetals share electrons to achieve a full valence shell
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When two atoms transfer electrons to achieve a full valence shell
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When a metal and a nonmetal share electrons to achieve a full valence shell
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When two metal atoms share electrons to achieve a full valence shell

1 answer

A covalent bond is best described as "when two nonmetals share electrons to achieve a full valence shell." In a covalent bond, atoms come together and share pairs of electrons, allowing them to attain a more stable electronic configuration.