Chemistry / Chem 0969 · Atom · ~20 seconds
Covalent Bond Formation
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A covalent bond forms when two atoms share a pair of electrons, each atom counting that pair toward its own valence shell.
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Two hydrogen atoms each contribute one electron to a shared pair, forming the covalent bond in H2.
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Covalent sharing differs from ionic transfer: both atoms keep a claim on the electrons rather than one losing them.