Question

consider the lewis dot structures of lithium and fluorine atoms. li ·f: which lewis dot structure best represents the compound formed when lithium and fluorine react? li+:f:- ·li-:f:+ li-:f:+ ·li+:f:-

Explanation:

Step1: Analyze electron - transfer

Lithium (Li) is a metal and has 1 valence electron. Fluorine (F) is a non - metal and has 7 valence electrons. Lithium will lose its 1 valence electron to achieve a stable noble - gas configuration, becoming a Li⁺ cation. Fluorine will gain that 1 electron to achieve a stable octet, becoming a F⁻ anion.

Step2: Determine Lewis dot structure of compound

The compound formed is lithium fluoride (LiF), and its Lewis dot structure is represented by the transfer of an electron from Li to F, resulting in a positively charged Li⁺ ion and a negatively charged F⁻ ion. The correct Lewis dot structure is $[\text{Li}]^{+}[\ddot{\text{F}}:]^{-}$.

Answer:

$[\text{Li}]^{+}[\ddot{\text{F}}:]^{-}$ (the first option in the given choices)