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30 July, 12:19

How are the codes (chemical formulas) for elements different from those for compounds?

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  1. 30 July, 14:08
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    a) Two or more atoms held together with bonds make up a molecule. b) Pure substances are made of only one type of atom. c) At least two types of atoms are required to make a compound. d) Mixtures can be made of two elements, two compounds, or an element & a compound.
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