Learn the basics about the atom, whilst learning about properties of matter. Atoms are the small bits that make up all the matter in the world around us. There are around one hundred different sorts of atom, from the lightest, hydrogen...

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Learn what intermolecular forces are, the three most common types and the differences between them. An intermolecular force is simply an attractive force between neighbouring molecules. There are three common types of intermolecular...

Learn the basics about what is the Brownian motion? what is it used for? Find out more in this video!

Learn the basics about Avogadro's Number, as a part of chemical calculations. Avogadro’s Number or the Avogadro Constant is 6.02 X 1023 Mol-1. It is the number of atoms per mole of the carbon-12 isotope. For atoms, the mass of Avogadro’s...

Learn the basics about catalytic converters, as a part of the overall environmental chemistry topic. A catalyst is a substance that causes a reaction to proceed more quickly, without being used up. A catalytic converter accelerates a...

We have already seen what dilutions are, and how to calculate them using the simple M1V1 = M2V2 equation. We are now going to look at serial dilutions. These are just multiple dilutions, and we can still use our same equation. Serial...

Transition metals all have similar and very useful physical and chemical properties. Their atoms can form ions with a variable charge which also gives them a range of colours in their compounds.

Learn the basics about covalent bonds, when learning about properties of matter. When similar atoms react, like non-metals combining with other non-metals, they share electrons. This is covalent bonding. Non-metals have shells of...

Learn the basics about the law of the conservation of mass, when learning about properties of matter. The Law of Conservation of Mass says that in chemical reactions no matter is lost or gained. The law of conservation of mass means that...

"William Gaudelli is associate professor of social studies and education and Coordinator of the Program in Social Studies at Teachers College, Columbia University. His research areas include global citizenship education and teacher...