Question

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a double covalent bond consists of two covalent bonds, for a total of shared electrons.
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Explanation:

A covalent bond is formed by sharing electrons. A single covalent bond shares 2 electrons. A double covalent bond is made up of two single covalent bonds. So, the number of shared electrons is \(2\times2 = 4\).

Answer:

A double covalent bond consists of two single covalent bonds, for a total of 4 shared electrons.