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pegah
i think oxygen bonded to the carbon atom in the functional group of ketone so the answer is (4) oxygen :))
i hope this be helpful

Oxygen is the atom bonded to carbon atom in the functional group of a ketone.

FUNCTIONAL GROUP:

  • Functional group refers to a specific grouping of elements that is characteristic of a class of compounds, and determines some properties and reactions of that class.

  • Ketone is a class of organic compounds characterized by the presence of a carbonyl group

  • Carbonyl group means that the carbon atom is covalently bonded to an oxygen atom as follows: RC=O.

Therefore, oxygen is the atom bonded to carbon atom in the functional group of a ketone.

Learn more about functional group at: https://brainly.com/question/24378712

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