Elements are made up of 1 type of atom.
Compounds are made of 2 or more elements that are chemically bonded. Example: Water is a compound that contains the elements hydrogen and oxygen. The hydrogen and oxygen atoms are chemically bonded into a molecule of water.
Molecules are two or more atoms that are chemically bonded. Sometimes the atoms in a molecule are the same element.
The differences between mixtures and compounds.
Mixtures can be made or separated by physical means.
Compounds can only be made or separated by a chemical reaction. They cannot be separated by physical means only.
Pure substances can be an element or a compound. They are always homogenous. Every molecule or atom throughout the substance will be the same.
Pure substances can be elements or compounds.
Mixtures
Mixtures can be of elements, compounds or both.
Mixtures can be
-homogeneous (Ex. water and alchohol)
-heterogeneous (Ex. oil and water)
Mixtures can be solid, liquid, or gas.
Lab
copper sulfate and sulfur
The problem: When copper sulfate, sulfur and water are mixed does a chemical reaction occur?
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