Classification of Matter What is matter Anything that

What is matter? • Anything that occupies space and has mass

What is matter made of? • Substances: matter that is an element or a

Example: • How would you classify a pencil? - Wood - Graphite - Eraser

Elements • The unit that makes up all matter are atoms – If all

Compounds • What happens when two or more elements come together? – They form

How about table salt? • Table salt is a compound: – Na. Cl •

Mixtures • What happens if you combine salt and water? – When you combine

Back to the pencil! • The pencil is a MIXTURE: – Wood (compound) –

Solutions • Salt water – mixture – Can you see the salt in the

Heterogenous Mixtures • A mixture in which different parts can be easily distinguished –

Categories of Heterogenous Mixtures • Colloids – Heterogenous mixture that never settles – Example:

Suspension • Some mixtures are neither solutions nor colloids – They are known as

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Classification of Matter

What is matter? • Anything that occupies space and has mass

What is matter made of? • Substances: matter that is an element or a compound So how do we classify matter: - By the materials matter is made up of - 4 states of matter

Example: • How would you classify a pencil? - Wood - Graphite - Eraser Break it down to the to its simpler parts!!!!

Elements • The unit that makes up all matter are atoms – If all atoms of the sample of matter have the same identity they are called elements (see periodic table of elements) • Example: Oxygen

Compounds • What happens when two or more elements come together? – They form a Compound • Example: H 20 – H is an element, O is an element, together they form the compound water

How about table salt? • Table salt is a compound: – Na. Cl • Na is an element, Cl is an element – Together they form a compound

Mixtures • What happens if you combine salt and water? – When you combine two or more substances that can be separated by physical means you have a mixture! • Salt can be separated from water by evaporation!!!

Back to the pencil! • The pencil is a MIXTURE: – Wood (compound) – graphite (element) – Eraser (compound)

Solutions • Salt water – mixture – Can you see the salt in the water? • No • Homogenous Mixture – – A material in which two or more substances are spread out evenly and cannot settle out when standing Homogenous mixture = Solution

Heterogenous Mixtures • A mixture in which different parts can be easily distinguished – Example: Pencil, Peanut Butter and Jelly Sandwich

Categories of Heterogenous Mixtures • Colloids – Heterogenous mixture that never settles – Example: Milk – How can you tell it’s a colloid? • By the Tyndall Effect – The scattering of light by the particles in the mixture

Suspension • Some mixtures are neither solutions nor colloids – They are known as a suspension • Is a heterogenous mixture containing a liquid in which visible particles settle out when standing – A muddy river » How is this different from a solution or colloid? - Particles carried in suspension will settle out