Elements, atoms, molecules, mixtures

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Presentation transcript:

Elements, atoms, molecules, mixtures

Periodic Table 118 elements Metals on the left, non-metals on the right

Element a pure chemical substance with unique properties made from a single type of atom Arranged by atomic number on the periodic table

Atom The smallest, indivisible particle that makes up all matter

Atoms Molecules

Molecule Two or more atoms that are chemically bonded together to create a new substance Water molecule: H2O 2 hydrogen atoms 1 oxygen atom

C C Carbon dioxide

Molecules Name Formula Amount of each atom Eg. Water H2O 2 hydrogen 1 oxygen Salt NaCl 1 sodium 1 chloride Caffeine C8N4H10O2 8 carbon 4 nitrogen 10 hydrogen 2 oxygen Glucose C6H12O6 6 carbon 12 hydrogen 6 oxygen Carbon dioxide CO2 1 carbon Acetone C3H6O 3 carbon 6 hydrogen

Mixture

Mixture Made from two or more different molecules that are mixed together The particles are not chemically combined to each other and can be separated

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