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Basi Science.


(physics and chemistry) the smallest component of an element having the chemical properties of the element


a particle that is electrically charged (positive or negative)


one of two or more atoms with the same atomic number but with different numbers of neutrons


(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


(physics and chemistry) the simplest structural unit of an element or compound


(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight


(chemistry, physics) capable of mixing


the force applied to a unit area of surface


resistance of a liquid to sheer forces (and hence to flow)


the process of becoming a vapor


the process of changing from a gaseous to a liquid or solid state


(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

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