Chemistry 9701/21 May June 2022 | Cambridge AS Level Past Papers With Mark Scheme

1. Identification of the highest energy orbital in a calcium atom and the shape of the orbital.
2. Thermal decomposition equation of calcium nitrate and the identification of the Group 2 nitrate that requires the highest decomposition temperature.
3. Prediction of observations when aqueous radium chloride is added to aqueous sodium sulfate.
4. Determining the number of protons and neutrons in an isotope of magnesium and writing its full electronic configuration.
5. Calculation of the mass of a magnesium isotope and understanding its relative atomic mass, with comparison to its properties.
6. Describing the behavior of magnesium when burning in oxygen, including reaction pathway diagrams and activation energy explanation.
7. Understanding the rate of reaction of magnesium with water, including explanations of why burning magnesium reacts more rapidly with water.