Hydrogen sulfide, H2S\mathrm{H_{2}S}H2S, is a toxic gas that smells of rotten eggs. It forms in sewers when waste decomposes.
Sulfur is in group 6 and has atomic number 16.
Give the electronic configuration of a sulfur atom.
Predict the number of covalent bonds formed by the sulfur atom in a hydrogen sulfide molecule. Explain your answer.
State the number of pairs of electrons in the outer shell of the sulfur atom in hydrogen sulfide that are not used in bonding.
Calculate the number of hydrogen atoms in 0.250 mol of hydrogen sulfide. Avogadro constant = 6.02 × 1023 per mol
Sulfur also forms carbon disulfide, CS2\mathrm{CS_{2}}CS2, which has a similar structure to carbon dioxide. Suggest the type of covalent bond between the carbon atom and each sulfur atom.
53 exam-style questions on Edexcel GCSE Chemistry 2.4 Covalent bonding, covering 2.4.1 Covalent bonding and simple molecules. Each one has a worked solution and a mark scheme showing where the marks go.