The formation of lithium fluoride (seen here) is due to a) a stronger pull by the lithium atom on its valence electron. b) increased stability in the completion of fluorine's outer shell. c) the addition of an outer (higher) energy level in the fluoride ion. d) decreased attraction between the lithium and fluoride ions.

The correct answer is option B) greater stability in the termination of the outer fluorine layer

Explanation:

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In the formation of lithium fluoride, lithium gives up its electron to stabilize the last layer of the fluorine, which in turn accepts that electron.

The compound is a neutral salt.

The correct answer is option B) greater stability in the termination of the outer fluorine layer.

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substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.