Simple molecules and covalent bonds

What the syllabus asks of you

• State that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations
• Describe the formation of covalent bonds in 4 Describe the formation of covalent bonds in simple molecules, including H2, Cl 2, H2O, CH4, simple molecules, including CH3OH, C2H4, O2, NH3 and HCl. Use dot-and-cross diagrams to CO2 and N2. Use dot-and-cross diagrams to show the electronic configurations in these and show the electronic configurations in these and similar molecules similar molecules
• Describe in terms of structure and bonding the 5 Explain in terms of structure and bonding the properties of simple molecular compounds: properties of simple molecular compounds: (a) low melting points and boiling points (a) low melting points and boiling points (b) poor electrical conductivity in terms of weak intermolecular forces (specific types of intermolecular forces are not required) (b) poor electrical conductivity