Element E is in Group 6. Lithium is in Group 1 and carbon is in Group 4.
Lithium reacts with E to form an ionic compound. Carbon reacts with E to form a covalent compound.
Which pair of formulae is consistent with these groups?
ionic: LiE\mathrm{LiE}LiE; covalent: CE2\mathrm{CE_{2}}CE2
ionic: LiE\mathrm{LiE}LiE; covalent: CE4\mathrm{CE_{4}}CE4
ionic: Li2E\mathrm{Li_{2}E}Li2E; covalent: CE2\mathrm{CE_{2}}CE2
ionic: Li2E\mathrm{Li_{2}E}Li2E; covalent: CE4\mathrm{CE_{4}}CE4
122 exam-style questions on OCR GCSE Chemistry 2.2 Bonding, covering 2.2.1 Metals, non-metals and the Periodic Table, 2.2.2 Types of chemical bonding and dot and cross diagrams, 2.2.3 Limitations of bonding models, and 2.2.4 Reactivity, atomic number and the modern Periodic Table. Each one has a worked solution and a mark scheme showing where the marks go.