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Compounds are made up of different types of atoms.

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Pure Substances are divided into 2 groups metals and non-metals.

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Pure substances are made up of only one type of atom or molecule.

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Pure substances are made up of only one type of atom or molecule.

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Example pure water.

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  Atoms vs compounds Atoms and molecules in pure substances  are chemically combined together

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  Atoms vs compounds Atoms and molecules in pure substances  are chemically combined together

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Elements are made out of one type of atoms. Compounds are created from more atoms chemically combined. Mixtures are just combinations of more types of atoms combined physicaly.

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1. Always move
2. Exist as free substances  for long time
3. Have mass and energy
4. Constructed from the same or different connected atoms.
molecule

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A positively charged ion, also called a cation, is formed when one electron or a few electrons are taken away from an atom. A negatively charged ion, also called an anion, is the opposite: It is formed when one electron or a few electrons are added to an atom.

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1. Main substances
2. Turn into ions
3. Always move
4. Have energy and mass