36) determine the kinds of intermolecular forces that are present in each element or compound.

a. k

b. ncl3

c. sih4

d. hf

I think the intermolecular forces would be,

Kr - London dispersion forces, It is intermolecular forces present in molecules and atoms. Kr is a noble gas in which atoms are joined by dispersion forces.

NCl3 - Has both dispersion forces and dipole-dipole forces. Dipole-dipole is a type of intermolecular forces present in polar molecules.

SiH4 - It is a non polar molecule therefore it has london dispersion force as the intermolecular force.

HF - It is a polar molecule and has dipole-dipole force. Hydrogen bond also exists between F and H