Structure 1.1 Introduction to the particluate nature of matter 

 Structure 1.1 covers the following concepts:

• Elements, compounds and mixtures
• Separation techniques 
• States of matter
• Changes of state
• Temperature and kinetic energy 

It is divided into three sub-sections (S1.1.1, S1.1.2 and S1.1.3). The time allocated is two hours. There is no addtional HL content.

Structure 1.1.1

Structure 1.1.1

• Elements are the primary constituents of matter, which cannot be chemically broken down into simpler substances.
• 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.

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Element, compounds and mixtures - this video has an overview of elements, compounds and mixtures.