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Pure Substance
A matter composed of only one type of atom or molecule
Mixture
A matter composed of two or more different types of atoms or molecules
Pure element
One element
ex: Iron
Pure compound
Composed of two or more elements
ex: iron and calcium
Pure : because it’s composed of 2 or more elements not an element and something else
Ionic compound
Means it’s composed of one element and one non metal
Covalent compound
2 or more non metals
Homogeneous
Uniform substance, no different pieces
Ex: coffee
Heterogeneous
Something not uniform, has separate layers
Ex: Cereal