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mendelevium
XDict
n
. 一種放射性元素
PyDict
一種放射性元素
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
mendelevium
n
1
:
a
radioactive
transuranic
element
synthesized
by
bombarding
einsteinium
with
alpha
particles
(
Md
is
the
current
symbol
for
mendelevium
but
Mv
was
formerly
the
symbol
) [
synonym
:
{
mendelevium
}, {
Md
}, {
Mv
}, {
atomic
number
101
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
mendelevium
\
men
*
de
*
le
"
vi
*
um
\ (
m
[
e
^]
n
*
d
[
e
^]*
l
[=
e
]"
v
[=
e
]*[
u
^]/
m
),
a
. [
From
Dmitri
Mendeleyev
,
discoverer
of
the
periodic
law
.]
(
Chem
.)
an
unstable
radioactive
element
discovered
in
1955
and
produced
artificially
only
in
very
small
quantities
;
symbol
Md
(
also
Mv
).
It
is
a
transuranic
element
with
atomic
number
101
.
Isotopes
255
,
256
,
257
,
and
258
have
been
prepared
.
Md258
,
the
longest
-
lived
,
has
a
half
-
life
of
two
months
.
--
HCP61
[
PJC
]
The
Elements
Database
(
element
)
mendelevium
Symbol
:
Md
Atomic
number
:
101
Atomic
weight
: (
256
)
Radioactive
metallic
transuranic
element
.
Belongs
to
the
actinoid
series
.
Only
known
isotope
,
Md
-
256
has
a
half
-
life
of
1
.
3
hours
.
First
identified
by
Glenn
T
.
Seaborg
,
Albert
Ghiorso
and
associates
in
1955
.
Alternative
name
{
unnilunium
}
has
been
proposed
.
Named
after
the
'
inventor
'
of
the
periodic
table
,
Dmitri
Mendeleev
.
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