How many electrons does a single covalent bond share? A double bond? A triple bond? If one of the atoms is?

2

4

6

polar covalent

nonpolar covalent

Single Covalent Bond

in a single bond, 1 pair of electrons,

double bond 2 pairs and triple bond 3 pairs of electrons are shared by the atoms.

If in a bond, 1 atom pulls electrons harder than the other, it is because the atom has more electronegativity( the capacity to have more electrons to itself).It holds electrons for a longer time.

this results in it gaining a partial positive negative charge and the other a partial positive charge. This bond with unequal sharing of electrons is called a polar covalent bond. if equal electron sharing takes place it is a covalent bond.

Single 2, double 4, triple 6

single bond shares 1 from each atom (so 2 total)

double bond shares 2 from each atom (so 4 total)

a triple bond shares 3 fro each atom (so 6 total)

Single 2 sigma e ,double 2sigma 2pi e and tripl 2sigma 4pi electrons