What type of bond is hydrogen to hydrogen?

Answer 1

Non-polar, single and covalent BondA bond between two non-metals is generally going to be a covalent bond due to the affinity to electrons and the need to "pick them up." Molecular hydrogen is a good example and the hydrogens are indeed bonded by a covalent bond, sharing electrons to complete a full valence shell.

In the category of covalent bonds, there are polar and non-polar covalent bonds. In some covalent bonds, electrons are shared unequally, resulting in the partial charge of one atom and the opposite charge of the other atom(s). This occurs when one atom in the compound has a higher electronegativity, or affinity to electrons.

But because both atoms in the molecule H2 have the same electronegativity (as atoms of the same element), electrons are shared more or less equally, resulting in a non-polar covalent bond.

Answer 2

Hydrogen to hydrogen bonds are covalent bonds, which involve the sharing of electrons between the two hydrogen atoms.