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5 definitions found
From:
DICT.TW English-Chinese Dictionary 英漢字典
eu·ro·pi·um
/jʊˈropiəm/
銪
From:
DICT.TW English-Chinese Medical Dictionary 英漢醫學字典
eu·ro·pi·um
/jʊˈropɪəm/
名詞
銪
From:
Webster's Revised Unabridged Dictionary (1913)
Eu·ro·pi·um
n.
Chem.
A
metallic
element
of
the
rare-earth
group
(
Lanthanide
series
),
discovered
spectroscopically
by
Demarcay
in
1896.
Symbol
,
Eu
;
atomic
number
63;
at
.
wt
., 151.965 (C=12.011);
valence
= +2
or
+3.
◄
►
From:
WordNet (r) 2.0
europium
n
:
a
bivalent
and
trivalent
metallic
element
of
the
rare
earth
group
[
syn
:
Eu
,
atomic number 63
]
From:
Elements database 20001107
europium
Symbol
:
Eu
Atomic
number
: 63
Atomic
weight
: 151.25
Soft
silvery
metallic
element
belonging
to
the
lanthanoids
. Eu-151
and
Eu-153
are
the
only
two
stable
isotopes
,
both
of
which
are
neutron
absorbers
.
Discovered
in
1889
by
Sir
William
Crookes
.
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