A radical is a reactive intermediate with a single ___ electron, formed by ___ of a covalent bond. Allylic radicals are stabilized by, making them ___ stable than tertiary radicals. A compound that contains an especially weak bond that serves as a source of radicals is called a radical . Treatment of cyclohexene with N-bromosuccinimide in the presence of light leads to___ by ___ intermediates. The stability of a radical as the number of alkyl groups bonded to the radical carbon increases. Although alkanes undergo radical substitution reactions with both Cl_2 and Br_2 chlorination is ___ than bromination. A compound that prevents radical reactions from occurring is called a radical ___ Treatment of cyclohexene with bromine in an organic solvent leads to ___ by ___ intermediates. Radical halogenation reactions occur racemization at a stereogenic center.

unpaired

homolysis

more

initiator

allylic substitution

radical

increases

faster

inhibitor

addition

ionic

with

Explanation:

The list of suitable words to be used to fill in the blank spaces in the sentences have been shown in the image attached.

A radical is any specie that contains an unpaired (odd) electron. Radicals are formed by homolysis of covalent bonds.

Due to the double bond involved in resonance, allylic radicals are more stable than tertiary radicals although stability of radical increases with the number of alkyl groups present. Initiators easily supply free radicals for radical reactions.

Addition reactions are faster with Cl2 than with Br2 because chlorine is more reactive than bromine. The addition of Br2 to cyclohexene occur via ionic mechanism and ionic intermediates.

Radical halogenation reactions occur with racemization at a stereogenic center.

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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