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elements are denoted by the symbol of their formula/name, only. Fe = iron, S = sulfur, no other element is involved when something is a pure element. diatomic gases, O2, N2, etc. are elements

compounds have 2 or more elements in the formula

mixtures are when 2 or more substances are placed together but they are not bound to each other

if the compound has (aq) after the symbols, this means that the compund is in aqueous conditions and this is a solution, which is a mixture.

i copied and pasted this from Yahoo so please don't hate!

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13y ago

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