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tantalum 音标拼音: [t'æntələm]
XDict
n
. 金属元素,符号
Ta
,原子序
83
PyDict
金属元素,符号
Ta
,原子序
83
Taiwan
MOE
computer
dictionary
(
moecomp
)
tantalum
钽
TA
Network
Terminology
(
netterm
)
tantalum
钽
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
tantalum
n
1
:
a
hard
grey
lustrous
metallic
element
that
is
highly
resistant
to
corrosion
;
occurs
in
niobite
and
fergusonite
and
tantalite
[
synonym
: {
tantalum
}, {
Ta
}, {
atomic
number
73
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Tantalum
\
Tan
"
ta
*
lum
\,
n
. [
NL
.
So
named
on
account
of
the
perplexity
and
difficulty
encounterd
by
its
discoverer
(
Ekeberg
)
in
isolating
it
.
See
{
Tantalus
}.] (
Chem
.)
A
rare
nonmetallic
element
found
in
certain
minerals
,
as
tantalite
,
samarskite
,
and
fergusonite
,
and
isolated
as
a
dark
powder
which
becomes
steel
-
gray
by
burnishing
.
Symbol
Ta
.
Atomic
weight
182
.
0
.
Formerly
called
also
{
tantalium
}.
[
1913
Webster
]
The
Elements
Database
(
element
)
tantalum
Symbol
:
Ta
Atomic
number
:
73
Atomic
weight
:
180
.
948
Heavy
blue
-
grey
metallic
transition
element
.
Ta
-
181
is
a
stable
isotope
,
and
Ta
-
180
is
a
radioactive
isotope
,
with
a
half
-
life
in
excess
of
10
^
7
years
.
Used
in
surgery
as
it
is
unreactive
.
Forms
a
passive
oxide
layer
in
air
.
Identified
in
1802
by
Ekeberg
and
isolated
in
1820
by
Jons
J
.
Berzelius
.
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