(40) GCSE Chemistry Revision "Covalent Bonding 2: Bonding in Water, Ammonia and Methane"

Covalent Bond

A shared pair of electrons between non-metal elements.

Water

A molecule with the formula H2O, consisting of two hydrogen atoms and one oxygen atom.

Ammonia

A molecule with the formula NH3, consisting of one nitrogen atom and three hydrogen atoms.

Methane

A molecule with the formula CH4, consisting of one carbon atom and four hydrogen atoms.

Dot and Cross Diagram

A diagram used to show covalent bonding, where dots and crosses represent electrons.

Stick Diagram

A diagram used to represent covalent bonds with lines, where each line indicates a single covalent bond.

Energy Level Diagram

A diagram that shows the arrangement of electrons in energy levels around an atom.

Covalent Bonds in Water

The water molecule contains two covalent bonds formed by sharing electrons between hydrogen and oxygen.

Covalent Bonds in Ammonia

The ammonia molecule has three covalent bonds formed by sharing electrons between nitrogen and hydrogen.

Covalent Bonds in Methane

The methane molecule has four covalent bonds formed by sharing electrons between carbon and hydrogen.