Compounds and mixtures

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Presentation transcript:

Compounds and mixtures Chapter 4

Elements: - consists of only one kind of atom, - cannot be broken down into a simpler type of matter by either physical or chemical means, and can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen). A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound together. Compounds: consists of atoms of two or more different elements bound together, can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means), has properties that are different from its component elements, and always contains the same ratio of its component atoms. Mixtures: consists of two or more different elements and/or compounds physically intermingled, can be separated into its components by physical means, and often retains many of the properties of its components.

What are some ways you can separate a mixture? Solid mixtures? Solid and liquid? -What kind of tools might you need? Thought experiment: You have a mixture of sand, water, and gravel. How can you separate this mixture into its different parts?

Real World Application Write your answers on the dry erase boards provided. What are some situations where it might be good to know how to separate a mixture into its component parts?