part3-+compounds,elements,particale+theory,+pure+substances,+mixtures,+heterogeneous&&homogeneous.

Compounds & Elements- "Compound" comes from the same root word as "compose", meaning make up or put together. Compounds are pure substance that are made up of two or more elements chemically combined together. They can be broken down into elements again by chemical means.

Particle Theory- The particle theory of matter explains why pure substances are always homogeneous- because each pure substance contains it's own unique kind of particle. If the particles are uniformly scatter, the mixture is a homogeneous solution, and if the particles aren't uniformly scattered, the mixture is heterogeneous mechanical mixtures.

Pure Substance- Contains one kind of particles

Mixtures: cotains at least two different pure substances.

Classifying Mixtures: suspension, solution, collid, and mechanical.

Suspension: a mechanical mixture consisting of a liqiudor a gas with small particles that are distruibuted trough it, but that separate out if the suspension is left undisturbed.

Solution: a homogeneous mixture of two or more pure substances.

Collid: a type of mechanical mixture in which extremely small particles of one or more substances are evenly and stacly distributed in onre or more others (e.g, whipped cream is a collid f cream particles in air.)

Mechanical Mixture: a substance made of more then one kind of particle in which the articles are not uniformly scattered.

HOMOGENEOUS VS. HETERGENEOUS Matter can be classified according to it's state: a solid, a liqiud, or a gas. As well, you may have learned that it can be classified according to one of its properties: heterogeneous or homogeneous.

Heterogeneous- term applied to mixtures rhat are not of a uniform composition throughout (e.g; metal orges)

Homogeneous- term applied to pure substances and to mixtures that are of a uniform composition throughout (e.g, solutions and alloys.)