what is a covalent bond?

A covalent bond is a type of chemical bond where two atoms share one or more pairs of electrons instead of transferring them, which helps each atom become more stable.

Simple definition

• In a covalent bond, atoms share electrons between them rather than one atom fully taking electrons from another.

• This sharing makes the atoms’ outer electron shells more “complete,” which lowers their energy and makes the molecule more stable.

How it works (in plain language)

• Imagine two atoms both “want” extra electrons to feel stable; instead of fighting over them, they overlap and share a pair in the space between them.

• Those shared electrons are attracted to both atomic nuclei, so they act like a glue holding the atoms together.

Everyday examples

• Water, H2OH_2OH2​O, has covalent bonds between hydrogen and oxygen atoms.
• Oxygen gas, O2O_2O2​, and nitrogen gas, N2N_2N2​, are classic examples where atoms share electrons in double or triple covalent bonds.

Types of covalent bonds (quick)

• Single bond: one shared pair of electrons (like in H2H_2H2​).

• Double bond: two shared pairs (like in O2O_2O2​).

• Triple bond: three shared pairs (like in N2N_2N2​).

Polar vs nonpolar

• If the two atoms have similar electronegativities (similar “pull” on electrons), the sharing is fairly equal: a nonpolar covalent bond.

• If one atom pulls a bit harder, the sharing is uneven and the bond is polar covalent, giving one side a slight negative and the other a slight positive charge (as in water).

Information gathered from public forums or data available on the internet and portrayed here.