Structure 1.1—Introduction to the particulate nature of matter (SL/HL)

Distinguish the different states of matter. Use state symbols (s, l, g and aq) in chemical equations.

Structure 1.1.3—The temperature, T, in Kelvin (K) is a measure of average kinetic energy Ek of

What You’ll Learn:

  • Compounds consist of atoms of different elements chemically bonded together in a fixed ratio.
  • Mixtures contain more than one element or compound in no fixed ratio, which are not chemically bonded and so can be separated by physical methods.
  • Distinguish between the properties of elements, compounds, and mixtures.
  • Names of the changes of state should be covered: melting, freezing, vaporization (evaporation and boiling), condensation, sublimation and deposition.
  • The kelvin (K) is the SI unit of temperature and has the same incremental value as the Celsius degree (°C).


Syllabus Links

Structure 2.2—How do intermolecular forces influence the type of mixture that forms between two substances?

Structure 2.3—Why are alloys generally considered to be mixtures, even though they often contain metallic bonding?

Structure 2.4—Why are some substances solid while others are fluid under standard conditions?

Structure 2 (all),

Reactivity 1.2—Why are some changes of state endothermic and some exothermic?

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