characteristics of compounds chemistry - Search
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    Topic 3.4 - Elements, Compounds, and Mixtures Part 1.2 - YouTube
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    Compounds are substances composed of identical molecules consisting of atoms of two or more chemical elements. The important characteristics of compounds are:
    • Constituents are present in definite proportion by mass.
    • The properties of a compound are different from the properties of its constituents.
    • The constituents of a compound cannot be separated by simple physical processes.
    • Formation of a compound is generally accompanied by evolution of energy in the form of heat or light.
    • A compound has a fixed melting point and boiling point.
    • A pure compound is composed of the same elements combined in a fixed ratio by mass to form molecules.
    • A pure compound is homogeneous in nature.
    • Compounds will always have a constant composition in terms of atomic mass and elemental make-up.
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