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Topic 2.1 Elements, Compounds, Mixtures and Molecules - Coggle Diagram
Topic 2.1 Elements, Compounds, Mixtures and Molecules
Elements
Definition: An element is a substance that cannot be broken down into simpler substances through chemical means.
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Examples: Copper, Sulfur, Aluminium
Compounds
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Definition: A compound is a pure substances containing two or more elements chemically combined together in a fixed ratio.
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Physical and Chemical Properties: Has its own physical and chemical properties different from the elements that made it.
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Examples: Water, Carbon Dioxide
Mixtures
Definition: A mixture consists of two or more substances chemically mixed together in varying proportions.
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Physical and Chemical Properties: Each constituent that is part of the mixture retains its own physical and chemical properties.
Composition: In varied proportion. A mixture can be made up of any variations of elements and/or compounds.
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Molecules
Definition: A molecule is made up of two or more atoms chemically joined together. The atoms can be of the same element or different elements.
Note: Most non-metallic elements consists of simple covalent molecules made up of two atoms chemically joined together. These are called diatomic molecules
Examples: NaCl(Table Salt), CaO(Calcium Oxide)