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lawrencium 音標拼音: [lɔr'ɛnsiəm]
XDict
n
. 鐒
PyDict
鐒
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
lawrencium
n
1
:
a
radioactive
transuranic
element
synthesized
from
californium
[
synonym
: {
lawrencium
}, {
Lr
}, {
atomic
number
103
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
lawrencium
\
lawrencium
\
n
. [
from
Ernest
O
.
Lawrence
,
inventer
of
the
cyclotron
.]
A
transuranic
element
of
atomic
number
103
.
It
was
discovered
in
1961
by
bombardment
of
californium
in
a
cyclotron
with
boron
nuclei
.
Other
isotopes
were
prepared
in
1965
at
Dubna
.
The
atomic
weight
of
the
most
stable
isotope
is
256
,
having
a
half
-
life
of
35
seconds
.
Symbol
Lr
. --
HCP61
Syn
:
Lr
.
[
WordNet
1
.
5
]
Lr
\
Lr
\
n
.
The
chemical
symbol
for
{
lawrencium
},
a
transuranic
element
of
atomic
number
103
.
Syn
:
lawrencium
.
[
WordNet
1
.
5
]
The
Elements
Database
(
element
)
lawrencium
Symbol
:
Lr
Atomic
number
:
103
Atomic
weight
: (
262
)
Appearance
unknown
,
however
it
is
most
likely
silvery
-
white
or
grey
and
metallic
.
Lawrencium
is
a
synthetic
rare
-
earth
metal
.
There
are
eight
known
radioisotopes
,
the
most
stable
being
Lr
-
262
with
a
half
-
life
of
3
.
6
hours
.
Due
to
the
short
half
-
life
of
lawrencium
,
and
its
radioactivity
,
there
are
no
known
uses
for
it
.
Identified
by
Albert
Ghiorso
in
1961
at
Berkeley
.
It
was
produced
by
bombarding
californium
with
boron
ions
.
The
name
is
temporary
{
IUPAC
}
nomenclature
,
the
origin
of
the
name
comes
from
Ernest
O
.
Lawrence
,
the
inventor
of
the
cyclotron
.
If
sufficient
amounts
of
lawrencium
were
produced
,
it
would
pose
a
radiation
hazard
.
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