Question

The most stable compound is

• A. LiF
• B. LiCl
• C. LiBr
• D. LiI

Answer 1

Answer: (A)

LiF

Answer 2

The electronegativity of halogen is as: $F > Cl > Br > I$ Among alkali metals the electropositive character increases as:
$Li < Na < K < Rb < Cs$
Hence, $LiF$ is the most stable compound.