Chemistry · Chemical Bonding

Electronegativity increases as we go from left to right in a period. So, the electronegativity difference between elements and chlorine decreases. Ionic character decreases with a decrease in the value of electronegativity difference between elements. thus the correct order is: CCl4<BCl3<BeCl2<LiCl.

CCl₄ has the lowest % ionic character because carbon and chlorine have a small electronegativity difference, resulting in a covalent bond with minimal ionic character.

BCl₃ has a higher % ionic character than CCl₄ due to a slightly greater electronegativity difference between boron and chlorine.

BeCl₂ exhibits significant ionic character as beryllium and chlorine have a moderate electronegativity difference, leading to partial ionic bonding.

LiCl is primarily ionic as lithium and chlorine have a large electronegativity difference, resulting in a compound with high ionic character.

HCl has a noticeable ionic character due to the significant electronegativity difference between hydrogen and chlorine, though less than that of LiCl.