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請輸入英文單字,中文詞皆可:
boron 音標拼音: [b'ɔr
,
ɑn]
XDict
n
. 硼
PyDict
硼
WordNet
(
r
)
3
.
0
(
2006
) (
WordNet
)
boron
n
1
:
a
trivalent
metalloid
element
;
occurs
both
in
a
hard
black
crystal
and
in
the
form
of
a
yellow
or
brown
powder
[
synonym
:
{
boron
}, {
B
}, {
atomic
number
5
}]
The
Collaborative
International
Dictionary
of
English
v
.
0
.
48
(
gcide
)
Boron
\
Bo
"
ron
\ (
b
[=
o
]"
r
[
o
^]
n
),
n
. [
See
{
Borax
}.] (
Chem
.)
A
nonmetallic
element
occurring
abundantly
in
borax
.
It
is
reduced
with
difficulty
to
the
free
state
,
when
it
can
be
obtained
in
several
different
forms
;
viz
.,
as
a
substance
of
a
deep
olive
color
,
in
a
semimetallic
form
,
and
in
colorless
quadratic
crystals
similar
to
the
diamond
in
hardness
and
other
properties
.
It
occurs
in
nature
also
in
boracite
,
datolite
,
tourmaline
,
and
some
other
minerals
.
Atomic
number
5
.
Atomic
weight
10
.
81
.
Symbol
B
.
[
1913
Webster
]
The
Elements
Database
(
element
)
boron
Symbol
:
B
Atomic
number
:
5
Atomic
weight
:
10
.
811
An
element
of
group
13
of
the
periodic
table
.
There
are
two
allotropes
,
amorphous
boron
is
a
brown
power
,
but
metallic
boron
is
black
.
The
metallic
form
is
hard
(
9
.
3
on
Mohs
'
scale
)
and
a
bad
conductor
in
room
temperatures
.
It
is
never
found
free
in
nature
.
Boron
-
10
is
used
in
nuclear
reactor
control
rods
and
shields
.
It
was
discovered
in
1808
by
Sir
Humphry
Davy
and
by
J
.
L
.
Gay
-
Lussac
and
L
.
J
.
Thenard
.
2010
Census
U
.
S
.
Gazetteer
Files
Boron
,
CA
--
U
.
S
.
Census
Designated
Place
in
California
Population
(
2000
):
2025
Housing
Units
(
2000
):
1103
Land
area
(
2000
):
13
.
848524
sq
.
miles
(
35
.
867512
sq
.
km
)
Water
area
(
2000
):
0
.
000000
sq
.
miles
(
0
.
000000
sq
.
km
)
Total
area
(
2000
):
13
.
848524
sq
.
miles
(
35
.
867512
sq
.
km
)
FIPS
code
:
07568
Located
within
:
California
(
CA
),
FIPS
06
Location
:
35
.
015177
N
,
117
.
660799
W
ZIP
Codes
(
1990
):
93516
Note
:
some
ZIP
codes
may
be
omitted
esp
.
for
suburbs
.
Headwords
:
Boron
,
CA
Boron
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