6.1 Introduction

The previous sections in this unit include many terms which may have been unfamiliar to you: for example, atom, element, compound, molecule and bond. Chemistry has a language all of its own and grasping the terminology can be as much of a problem as understanding the chemistry itself. In Section 6, you will consider the language of chemistry before returning to the examination of bonding.


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3 What are compounds?

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Click on the video clip to watch Elements and Compounds, which focuses on water and its constituent elements.

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Introduction

Models are mechanisms for communication. This course looks at what a model is and what the process of modelling is about. The techniques discussed here are applicable to a wide range of systems and have one thing in common: they are all commonly used diagramming techniques. The five techniques are: data flow diagrams, use case modelling, activity diagrams, entity–relationship diagrams and state machines.

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Copyright © 2016 The Open University

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