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Basic Science Vocabulary

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Atom
(physics and chemistry) the smallest component of an element having the chemical properties of the element
Ion
a particle that is electrically charged (positive or negative)
Isotope
one of two or more atoms with the same atomic number but with different numbers of neutrons
Mixture
(chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding)
Chemical Formula
a representation of a substance using symbols for its constituent elements
Molecule
(physics and chemistry) the simplest structural unit of an element or compound
Compound
(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
Miscible
(chemistry, physics) capable of mixing
Pressure
the force applied to a unit area of surface
Viscosity
resistance of a liquid to sheer forces (and hence to flow)
Evaporation
the process of becoming a vapor
Condensation
the process of changing from a gaseous to a liquid or solid state
Sublimation
(chemistry) a change directly from the solid to the gaseous state without becoming liquid
Chemical Bond
an electrical force linking atoms
Chemical Structure
the arrangement of atoms in a substance