Elements, Compoundsand Mixtures

Word StudyThe word solution has different

meanings.

Solution can mean “the answer to a

problem.”It was easy to find the solution to the math

problem.

Solution can also mean “a type of

mixture.”He mixed a solution

of salt and water.

5 x 8 = ?

Word StudyThe word suspension also has different

meanings.

Suspension can mean “to force

someone to leave a place (like school)

for a period of time as a form of punishment.”

Suspension can also mean “a substance

(usually a liquid) that has very small pieces of a solid material mixed

in it.”(learner’sdictionary.com)

homo means “the same”

hetero means “not the same”

Word Study: Prefixes

Pure Substances

A pure substance is matter that is made of only one kind of particle. For example, the oxygen in a tank is a pure substance.

Elements

An element is a pure substance that is made of only one type of atom. For example, aluminum is an element.

Compounds

A compound is a pure substance made of two or more elements that join chemically. Water is a compound of hydrogen and oxygen.

Common Compounds

Table salt is a common compound. The elements sodium and chlorine join to make salt.

Sugar is also a common compound. It is made of the elements carbon, hydrogen and oxygen

Mixtures

A mixture contains two or more pure substances. The substances are mixed together. They do NOT join chemically. Air is a mixture of gases.

air

Mixtures - Facts

Mixtures are NOT pure substances

In a mixture 2 or more substances come together

They do NOT join chemically

They can be heterogeneous or homogeneous

Heterogeneous Mixtures

A suspension is one kind of heterogeneous mixture. When you shake salad dressing, drops of oil and drops of vinegar mix but you an still see the different parts.

Homogeneous Mixtures

A solution is a homogeneous mixture. In a solution , one material dissolves in another material. You cannot see the different parts in this kind of mixture.For example, think about adding sugar to a glass of tea. The sugar dissolves and you can’t see it.

Watch These Videos to Support Your Learning

The Chemistry of Fire Chemical Change Chemistry Basics: Matter (Look for the

3rd title). This is a whole length video. Watch just one or two segments a day.

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