វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
Platinum
ENGLISH MEANING
noun
1.
A
metallic
element
,
intermediate
in
value
between
silver
and
gold
,
occurring
native
or
alloyed
with
other
metals
,
also
as the platinum
arsenide
(
sperrylite
). It is
heavy
tin-white
metal
which
is
ductile
and
malleable
,
but
very
infusible
, and
characterized
by
its
resistance
to
strong
chemical
reagents
. It is
used
for
crucibles
, for
stills
for
sulphuric
acid
,
rarely
for
coin
, and in the
form
of
foil
and
wire
for
many
purposes
.
Specific
gravity
21.5.
Atomic
weight
194.3.
Symbol
Pt.
Formerly
called
platina
.