Which of the following statements is/are correct? Select all that apply. All molecules have dispersion forces.
Polar molecules have dipole-dipole forces.
Nonpolar molecules have dipole-dipole forces.
Hydrogen bonding is present in molecules that contain H, N, O or F.
Hydrogen bonding is present in molecules that have an N-H, F-H or O-H bond.
Molecules that have hydrogen bonding will also have dipole-dipole forces.
Molecules that have dipole-dipole forces will also have hydrogen bonding.
The only intermolecular force present in nonpolar molecules is dispersion.
The only intermolecular force present in polar molecules is dipole-dipole forces.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."