Define element and compound. Give an example for each.
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Elements are substances that are made from one type of atom. ... Elements are represented by symbols. Compounds are substances made from atoms of different elements joined by chemical bonds. They can only be separated by a chemical reaction. Common examples are water (H2O), salt (sodium chloride, NaCl), methane (CH4).
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Elements:
Elements constitute the simplest chemical substances in which all the atoms are exactly the same.
Examples include carbon, sulfur, oxygen, iron, copper, aluminium.
Compounds :
Compounds are chemical substances made up of two or more elements that are chemically bound together in a fixed ratio.
Examples are water (H2O), salt (sodium chloride, NaCl), methane (CH4).
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