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Sunday, 8 July 2012

Substances

An atom is neutral particle which is the smallest unit of an element that has all the characteristics of that element


An element is a substance that consists of only one type of atom, so all elements in the Periodic Table are made up of atoms which are unique to that element


A compound is a mixture of elements that have chemically reacted with each other to become bonded to each other


A mixture contains two or more substances which have not reacted with each other

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