covalent and metallic bonds are termed primary bonds, while the
bonds resulting form either permanent or induced dipoles are called
secondary
bonds. Primary bonds are much stronger than secondary bonds.
States of matter
Materials can be classified as having three possible states: gas, liquid or solid.
Solids have definite shapes and volumes. Liquids have definite volumes but
can alter their shape to take up the shape of
a
containing vessel. Gases have no
definite volume or shape but expand until they fill any container in which they
are placed. In general, solids have higher densities than their liquid ...
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