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請輸入英文單字,中文詞皆可:
einsteinium
XDict
n
. 锿
PyDict
□
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
einsteinium
n
1
:
a
radioactive
transuranic
element
produced
by
bombarding
plutonium
with
neutrons
[
synonym
: {
einsteinium
}, {
Es
}, {
E
},
{
atomic
number
99
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Es
\
Es
\
n
.
the
chemical
symbol
for
{
einsteinium
},
a
transuranic
element
with
atomic
number
99
.
The
atomic
weight
of
the
longest
-
lived
isotope
,
with
a
half
-
life
of
276
days
,
is
254
.
The
first
isotope
discovered
,
having
atomic
weight
253
and
a
half
-
life
of
20
days
,
was
recognized
in
1952
in
the
debris
from
a
hydrogen
bomb
test
.
As
much
as
3
micrograms
of
einsteinium
were
produced
by
a
complex
process
involving
long
irradiation
of
plutonium
isotopes
in
nuclear
reactors
.
Its
chemical
properties
are
those
of
a
trivalent
actinide
element
. --
HCP61
Syn
:
einsteinium
,
atomic
number
99
.
[
WordNet
1
.
5
PJC
]
The
Elements
Database
(
element
)
einsteinium
Symbol
:
Es
Atomic
number
:
99
Atomic
weight
: (
254
)
Appearance
is
unknown
,
however
it
is
most
probably
metallic
and
silver
or
gray
in
color
.
Radioactive
metallic
transuranic
element
belonging
to
the
actinoids
.
Es
-
254
has
the
longest
half
-
life
of
the
eleven
known
isotopes
at
270
days
.
First
identified
by
Albert
Ghiorso
and
associates
in
the
debris
of
the
1952
hydrogen
bomb
explosion
.
In
1961
the
first
microgram
quantities
of
Es
-
232
were
separated
.
While
einsteinium
never
exists
naturally
,
if
a
sufficient
amount
was
assembled
,
it
would
pose
a
radiation
hazard
.
English
-
German
(
Internet
Dictionary
Project
)
Einsteinium
[
Noun
]
English
-
French
(
Internet
Dictionary
Project
)
einsteinium
(
m
)[
Noun
]
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