Science me single bond and double bond smjayo

Single Bond: A single bond is formed when two atoms share one pair of electrons. This is the weakest type of covalent bond. For example, in a water molecule ($H_2O$), each hydrogen atom shares one electron with the oxygen atom, forming two single bonds.

Double Bond: A double bond is formed when two atoms share two pairs of electrons (a total of four electrons). Double bonds are stronger and shorter than single bonds. An example is the oxygen molecule ($O_2$), where the two oxygen atoms share two pairs of electrons to form a double bond between them.