C2.5 Simple molecules and covalent bonds

What is a covalent bond?

• Bond formed when a pair of electrons is shared between 2 non-metals atoms leading to noble gas electronic configurations

Explain in terms of structure and bonding the properties of simple molecular compounds

1. Low melting points and boiling points: weak electrostatic forces of attraction between the molecules which require very little energy to break

2. Poor electrical conductivity: don’t have any free ions or electrons that can carry charge, most covalent compounds act as insulators when they are solid

Draw the covalent bond for hydrogen

Draw the covalent bond for chlorine

Draw the covalent bond for hydrogen chloride

Draw the covalent bond for water

Draw the covalent bond for methane

Draw the covalent bond for ammonia

Draw the covalent bond for carbon dioxide

Draw the covalent bond for oxygen

Draw the covalent bond for nitrogen

Draw the covalent bond for methanol

Ch₃OH

Draw the covalent bond for ethene

C₂H₄