SC6a - How do covalent bonds work?
- Two atoms with incomplete outer electron shells, share some electrons so that they each have full shells of electrons.
- For example Hydrogen is missing one electron and Chlorine is missing one and so they bond and have a pair of electrons shared between them.
SC6a - Why do molecular compounds (covalently bonded) have low melting points?
While the electrostatic forces between the atoms in single molecule are very strong, the intermolecular forces of attraction are very weak and so they require little energy to break.
SC6a - What is the valency of an atom and how does this affect the amount of bonds it forms?