Covalent Bond Examples

Chemistry: AQA GCSE Higher, topic 2.1.8

Test yourself on Covalent Bond Examples

In methane (CH₄), how many extra electrons does a carbon atom need to share in order to complete its outer electron shell?
Select the correct statement for each pair about ammonia (NH₃).
A triple covalent bond contains 3 shared pairs of electrons. In N₂, how many electrons in total are shared between the two nitrogen atoms?
A nitrogen atom in ammonia (NH₃) needs 3 extra electrons to complete its outer shell. A chlorine atom in hydrogen chloride (HCl) needs 1 extra electron. Based on this, which statement is correct?
A carbon atom in methane (CH₄) needs 4 extra electrons to complete its outer shell. A nitrogen atom in ammonia (NH₃) needs 3 extra electrons. Based on this, which statement is correct?