Intermolecular forces

What is Electronegativity?

what affects it and describe it's trend

the ability of an atom to attract bonding electrons in a covalent bond

- affected by nuclear charge, atomic radius and electron shielding

-increases across the periodic table and up the groups

Describe non-polar bonds

bonded electron pair is shared equally because bonded atoms have same/similar electronegativity

Describe polar bonds

when bonded electron pair is shared unequally between the atoms because the bonded atoms have a difference in electronegativity

bonds are polarised with small partial charges at different ends of the bond

What are intermolecular forces?

Name the types from strongest to weakest

- IMF are weak interactions between dipoles of different molecules

- hydrogen bonds, permanent dipole-dipole interactions and london forces