Sodium chloride (NaCl) has the highest electronegativity difference between sodium and chlorine.

HCl has a polar covalent bond due to the difference in electronegativity between hydrogen and chlorine.

HCl is a polar molecule due to the difference in electronegativity between hydrogen and chlorine.

H2 has a bond order of 1, calculated as (2 bonding electrons - 0 antibonding electrons)/2 = 1.

N2 has the highest bond order of 3, while O2 has a bond order of 2 and F2 has a bond order of 1.

All of the listed elements can form coordinate bonds by donating a lone pair of electrons.

Carbon can form multiple bonds (double and triple bonds) due to its ability to hybridize and share electrons.

H2O has two lone pairs and two bonding pairs, resulting in a bent geometry.

BF3 has a trigonal planar geometry with bond angles of approximately 120 degrees.

He2 has a bond order of 0, calculated as (2 bonding electrons - 2 antibonding electrons)/2 = 0.

H2 has a bond order of 1, calculated as (2 bonding electrons - 0 antibonding electrons)/2 = 1.

In PCl5, the phosphorus atom is dsp3 hybridized, resulting in a trigonal bipyramidal geometry.

In BrF5, bromine undergoes sp3d hybridization to form five bonds with fluorine and has one lone pair.

In BrF5, the bromine atom is sp3d2 hybridized, allowing it to form five bonds with fluorine.

BeCl2 has two bonding pairs and no lone pairs, resulting in a linear geometry.

NH3 has a trigonal pyramidal shape, which is not symmetrical due to the lone pair.

NH3 has three bonding pairs and one lone pair, resulting in a trigonal pyramidal shape.

SF4 has four bonding pairs and one lone pair, resulting in a seesaw molecular geometry.

SF4 has four bonding pairs and one lone pair, resulting in a seesaw shape.

SF4 has four bonding pairs and one lone pair, resulting in a seesaw shape.

XeF4 has four bonding pairs and two lone pairs, resulting in a square planar geometry.

CH4 has a tetrahedral shape due to the sp3 hybridization of the carbon atom.

CH4 has a tetrahedral shape due to the sp3 hybridization of the carbon atom.

PCl5 has five bonding pairs and no lone pairs, resulting in a trigonal bipyramidal geometry.

BF3 has a trigonal planar geometry due to sp2 hybridization of boron.

C2H2 has sp hybridization, with a triple bond between the two carbon atoms.

Water has the highest boiling point due to strong hydrogen bonding between its molecules.

N2 has the highest bond order of 3 among the given options.

Fluorine has the highest electronegativity of all elements.

F2 has the lowest bond energy due to the repulsion between the lone pairs on the fluorine atoms.