KEY POINTS:
- The physical and chemical properties of substances are determined by:
- what the particles are,
- how the particles are arranged, and
- the types of bonds and forces that exist between the particles.
- Physical properties include: melting / freezing points, boiling / condensing points, density, malleability, ductility, colour, appearance, solubility, magnetism, volatility and viscosity.
- Chemical properties relate to any chemical reaction that the substances may undergo: synthesis, oxidation, reduction, neutralisation, combustion, decomposition, displacement, precipitation.
THINK OUTSIDE THE BOX:
- Design an acid rain proof umbrella. What materials would you select for each part? Justify your choices with their desirable properties.
- Why is Iron Man’s suit not made of iron?