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Chemistry
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"Chemistry
is the
science of
matter, especially its
chemical reactions, but also its
composition, structure and properties. Chemistry
is concerned with atoms and their interactions
with other atoms, and particularly with the
properties of
chemical bonds. Chemistry is sometimes
called "the
central science" because it connects physics
with other
natural sciences such as
geology and
biology. Chemistry is a branch of
physical science but
distinct from physics. The etymology of the
word chemistry has been much disputed.[6]
The genesis of chemistry can be traced to
certain practices, known as
alchemy, which had been practiced for
several
millennia in various parts of the world,
particularly the Middle East Traditional
chemistry starts with the study of
elementary particles,
atoms,
molecules,
substances, metals,
crystals and other aggregates of matter. in
solid, liquid, and gas
states, whether in isolation or combination.
The
interactions, reactions and transformations
that are studied in chemistry are a result of
interaction either between different chemical
substances or between
matter and
energy. Such behaviors are studied in a
chemistry
laboratory using various forms of
laboratory glassware. A
chemical reaction is a transformation of
some substances into one or more other
substances. It can be symbolically
depicted through a
chemical equation. The number of atoms on
the left and the right in the equation for a
chemical transformation is most often equal. The
nature of chemical reactions a substance may
undergo and the energy changes that may
accompany it are constrained by certain basic
rules, known as chemical laws.
Energy and
entropy considerations are invariably
important in almost all chemical studies.
Chemical substances are classified in terms of
their
structure, phase as well as their
chemical compositions. They can be analyzed
using the tools of
chemical analysis, e.g.
spectroscopy and
chromatography.
Scientists engaged in chemical
research are known as
chemists. Most chemists specialize in one or
more sub-disciplines."
Source:
Wikipedia
"Chemistry
is the