វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
Boron
ENGLISH MEANING
noun
1.
A
nonmetallic
element
occurring
abundantly
in
borax
. It is
reduced
with
difficulty
to the
free
state
,
when
it can be
obtained
in
several
different
forms
;
viz
., as a
substance
of a
deep
olive
color
, in a
semimetallic
form
, and in
colorless
quadratic
crystals
similar
to the
diamond
in
hardness
and
other
properties
. It
occurs
in
nature
also
in
boracite
,
datolite
,
tourmaline
, and
some
other
minerals
.
Atomic
weight
10.9.
Symbol
B.