What type of bond is C-O in CO; K-O in KOH; H-F in HF; Ni-Ni in Ni; F-F in F2?

Question

By what kind of bond I mean pure covalent, polar covalent, coordinate covalent, ionic, or metallic? There is one of each of those types of bonds...

Answer 1

The C-O bond in CO is a partial triple bond. The molecule has dipole moment.

There is no bond between K and O in KOH as it is an ionic bond. In the case of CO, there is sharing of electrons between the carbon and oxygen which results in the formation of a bond. In
KOH, it is the charges on the K+ and OH- ion that hold the ions together.

H-F is a little complex. It is a covalent bond between H and F. But, because of the high density of negative charge on the fluorine atom, it induces a partial positive charge on the hydrogen atom and a partial negative charge on itself. Hence, the hydrogen atom of one HF molecule and the fluorine atom of another HF molecule are partially attracted to each other, thus forming chains of HF.

The bond between the F atoms of the Fluorine molecule are covalent in nature, but due to the high density of negative charge on the F atom, the individual atoms repulse each other and the molecule is very unstable. (Look at the third link in the sources for details)

Answer 2

C-O is a covalent bond
K-O is an electrovalent bond
H-F is a covalent bond but highly polarized
Ni-Ni is a metallic bond
F-F is a covalent bond non polarized

Answer 3

CO polar covalent the oxygen atom being electronegative

K-O same as CO but more polar since the K atom is strongly
electropositive

H-F should be ionic F negative ion

Ni-Ni metallic

F-F pure covalent