វគ្គជំនាញកុំព្យូទ័រ
ចំណេះដឹងទូទៅ
ម្ហូបអាហារ
កំប្លែង
ទស្សន៍ទាយ
small
medium
large
damning
is a form of:
Strontium
noun
1.
(a
soft
silverwhite
metal
having a
radioactive
isotope
)
សារធាតុគីមីហៅស្ដ្រុងចូម (ពណ៌រាងទឹកប្រាក់រឹង)
ENGLISH MEANING
noun
1.
A
metallic
element
of the
calcium
group
,
always
naturally
occurring
combined
, as in the
minerals
strontianite
,
celestite
,
etc
. It is
isolated
as a
yellowish
metal
,
somewhat
malleable
but
harder
than
calcium
. It is
chiefly
employed
(as in the
nitrate
) to
color
pyrotechnic
flames
red
.
Symbol
Sr.
Atomic
weight
87.3.
2.
A
radioactive
isotope
of strontium
produced
by
certain
nuclear
reactions
, and
constituting
one of the
prominent
harmful
components
of
radioactive
fallout
from
nuclear
explosions
;
also
called
radiostrontium
. It has a
half-life
of 28
years
.