Aluminium oxide is an ionic compound formed when aluminium, a Group 3 metal, reacts with oxygen, a Group 6 non-metal.
A student is going to draw a dot and cross diagram for aluminium oxide. Electrons that came from aluminium atoms will be drawn as crosses and electrons that came from oxygen atoms will be drawn as dots. Only the outer shell electrons will be drawn on each oxide ion.
Which statement describes what the student should draw?
2 aluminium ions and 3 oxide ions, with 6 dots and 2 crosses on each oxide ion
2 aluminium ions and 3 oxide ions, with 6 dots and 3 crosses on each oxide ion
3 aluminium ions and 2 oxide ions, with 6 dots and 2 crosses on each oxide ion
3 aluminium ions and 2 oxide ions, with 6 dots and 3 crosses on each oxide ion
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.