How many electrons are shared in one molecule of nitrogen and in one molecule of ethene?

2.5.1. State that a covalent bond is formed when a pair of electrons is shared between two atoms leading to noble gas electronic configurations

2.5.2. Describe the formation of covalent bonds in simple molecules

2.5.3.1. low melting points and boiling points

2.5.3.2. poor electrical conductivity

2.5.4. Describe the formation of covalent bonds in simple molecules

2.5.5.1. low melting points and boiling points in terms of weak intermolecular forces (specific types of intermolecular forces are not required)

2.5.5.2. poor electrical conductivity