Presentation on theme: "Mixtures and Pure Substances"— Presentation transcript:
1 Mixtures and Pure Substances A Matter of FactMixtures and Pure Substances
2 Two Types of Matter Mixtures – two or more substances that are notchemically combined with eachother and can be separated byphysical means.Solutions – a special kind of mixturewhere one substance dissolves inanother. The “Best” MixturePure Substances – made of only one kind of matter and has definite properties.
3 Can it be separated by physical means? If the answer is no, the matter is a pure substance.An elementOr a compound
4 Pure Substances:Elements – simplest form of pure substance. They cannot be broken into anything else by physical or chemical means.Compounds – pure substances that are the unions of two or more elements. They can be broken into simpler substances by chemical means.
5 Elements Elements are the simplest pure substance. The smallest particle of an element that has the properties of that element is called an atom.An atom is the basic building block of matter.
6 Compounds Compounds are also pure substances. But compounds are made from more than one element.Water is a compound.Water can be broken down into simpler substances – hydrogen and oxygen.
7 Matter Yes No Yes No Is it separated by physical means? Pure Substance MixtureMixtureChemicallySeparated?HeterogeneousLooks like morethan 1 thingHomogeneousLooks like only1 thingYesNoSolution“Best” MixtureElement – cannot be brokendown into other substancesCompound – two ormore elementsAtom – Basic buildingblock of all matterMolecule – Basicparticle of Compounds