Molecules
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A molecule is an electrically neutral group of at least two atoms held
together by covalent chemical bonds. Molecules are distinguished
from ions by their electrical charge. However, in quantum physics,
organic chemistry, and biochemistry, the term molecule is often used
less strictly and applied to polyatomic ions.
In the kinetic theory of gases, the term molecule is often used for any
gaseous particle regardless of its composition. According to this
definition noble gas atoms are considered molecules despite the fact
that they are composed of a single non-bonded atom.
This is the Modafinil molecule model,
converted to PoVRay using spdbv
A molecule may consist of atoms of a single chemical element, as with
oxygen (O2), or of different elements, as with water (H2O). Atoms
and complexes connected by non-covalent bonds such as hydrogen
bonds or ionic bonds are generally not considered single molecules.
Attribute
-Attribute : Wikipedia
Water (H2O) is the most abundant compound on Earth's
surface, covering about 70%. In nature, it exists in liquid, solid, and
gaseous states. It is in dynamic equilibrium between the liquid and
gas states at standard temperature and pressure. At room
temperature, it is a tasteless and odorless liquid, nearly colorless with
a hint of blue.
Many substances dissolve in water and it is commonly referred
to as the universal solvent. Because of this, water in nature and in use
is rarely pure and some of its properties may vary slightly from those
of the pure substance. However, there are also many compounds that
are essentially, if not completely, insoluble in water.
Water is the only common substance found naturally in all
three common states of matter and it is essential for all life on
Earth.[3] Water usually makes up 55% to 78% of the human body.
-Attributed : Wikipedia
Water can be split into its constituent
elements, hydrogen and oxygen, by
passing an electric current through it.
This process is called electrolysis. Water
molecules naturally dissociate into H+
and OH− ions, which are attracted
toward the cathode and anode,
respectively. -Attribute
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