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strontium 音标拼音: [str'ɑntiəm]
XDict
n
. 锶[金属元素]
PyDict
锶[金属元素]
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
strontium
n
1
:
a
soft
silver
-
white
or
yellowish
metallic
element
of
the
alkali
metal
group
;
turns
yellow
in
air
;
occurs
in
celestite
and
strontianite
[
synonym
: {
strontium
}, {
Sr
}, {
atomic
number
38
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Strontium
\
Stron
"
ti
*
um
\,
n
. [
NL
.
See
{
Strontia
}.] (
Chem
.)
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
.
[
1913
Webster
]
The
Elements
Database
(
element
)
strontium
Symbol
:
Sr
Atomic
number
:
38
Atomic
weight
:
87
.
62
Soft
yellowish
metallic
element
,
belongs
to
group
2
of
the
periodic
table
.
Highly
reactive
chemically
.
Sr
-
90
is
present
in
radioactive
fallout
and
has
a
half
-
life
of
28
years
.
Discovered
in
1798
by
Klaproth
and
Hope
,
isolated
in
1808
by
Humphry
Davy
.
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