Draw the structures of organic compounds A and B. Omit all byproducts. Compound A reacts with magnesium and ether to form compound B. Compound B reacts with acetaldehyde followed by water to form a 5 carbon chain where carbon 2 is bonded to O H.

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b is the correct answer

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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