វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
តូច
មធ្យម
ធំ
Gallium
ENGLISH MEANING
noun
1.
A
rare
metallic
element
,
found
in
certain
zinc
ores
. It is
white
,
hard
, and
malleable
,
resembling
aluminium
, and
remarcable
for
its
low
melting
point
(86/ F.,
30/C
).
Symbol
Ga.
Atomic
weight
69.9.
2.
A
rare
metallic
element
,
found
combined
in
certain
zinc
ores
. It is
white
,
hard
, and
malleable
,
resembling
aluminium
, and
remarkable
for
its
low
melting
point
(86 F., 30 C.).
Symbol
, Ga; at. wt., 69.9. Gallium is
chiefly
trivalent
,
resembling
aluminium
and
indium
. It was
predicted
with
most
of
its
properties
,
under
the
name
eka-aluminium
, by
Mendelyeev
on the
basis
of the
periodic
law
.
This
prediction
was
verified
in
its
discovery
(in
1875
) by
its
characteristic
spectrum
(two
violet
lines
).