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h20

h20 is a stylized reference to water, commonly written as H2O in scientific contexts. The term h20 may appear in branding, shorthand, or on digital interfaces as a playful or informal variant, but it is not a standard chemical notation.

Water is a polar molecule composed of two hydrogen atoms covalently bonded to one oxygen atom. The

Physically, water is a liquid at standard conditions, with a melting point of 0°C and a boiling

Occurrence and uses: water covers vast portions of Earth’s surface and is essential for all known forms

History and naming: the substance has long been known to humanity under common names such as water.

molecule
has
a
bent
geometry
with
an
angle
of
about
104.5
degrees
and
engages
in
extensive
hydrogen
bonding.
These
interactions
give
water
high
surface
tension,
a
high
heat
capacity,
and
the
ability
to
dissolve
many
substances,
making
it
a
universal
solvent.
point
of
100°C
at
one
atmosphere
of
pressure.
It
is
densest
near
4°C
and
becomes
less
dense
when
frozen,
causing
ice
to
float
on
liquid
water.
Water’s
high
dielectric
constant
and
polarity
underlie
its
solvent
properties
and
its
role
in
supporting
chemical
and
biological
processes.
of
life.
It
exists
as
liquid
in
oceans,
rivers,
and
groundwater,
as
ice
in
polar
and
high-altitude
regions,
and
as
vapor
in
the
atmosphere.
Human
use
spans
drinking
and
sanitation,
agriculture,
manufacturing,
energy
production,
cooling,
and
many
household
and
industrial
applications.
The
water
cycle
describes
its
continuous
movement
through
environments.
The
chemical
formula
H2O,
indicating
two
hydrogen
atoms
and
one
oxygen
atom,
was
established
in
the
18th
century
as
the
elemental
identities
of
hydrogen
and
oxygen
were
clarified
by
early
scientists.