xenon 音标拼音: [z'inɑn]
n . 氙,稀有气体元素,符号
Xe 氙,稀有气体元素,符号
Xe xenon n 1 :
a colorless odorless inert gaseous element occurring in the earth '
s atmosphere in trace amounts [
synonym : {
xenon }, {
Xe },
{
atomic number 54 }]
Noble \
No "
ble \,
a . [
Compar . {
Nobler };
superl . {
Noblest }.] [
F .
noble ,
fr .
L .
nobilis that can be or is known ,
well known ,
famous ,
highborn ,
noble ,
fr .
noscere to know .
See {
know }.]
1 .
Possessing eminence ,
elevation ,
dignity ,
etc .;
above whatever is low ,
mean ,
degrading ,
or dishonorable ;
magnanimous ;
as ,
a noble nature or action ;
a noble heart .
[
1913 Webster ]
Statues ,
with winding ivy crowned ,
belong To nobler poets for a nobler song . --
Dryden .
[
1913 Webster ]
2 .
Grand ;
stately ;
magnificent ;
splendid ;
as ,
a noble edifice .
[
1913 Webster ]
3 .
Of exalted rank ;
of or pertaining to the nobility ;
distinguished from the masses by birth ,
station ,
or title ;
highborn ;
as ,
noble blood ;
a noble personage .
[
1913 Webster ]
Note :
Noble is used in the formation of self -
explaining compounds ;
as ,
noble -
born ,
noble -
hearted ,
noble -
minded .
[
1913 Webster ]
{
Noble gas } (
Chem .),
a gaseous element belonging to group VIII of the periodic table of elements ,
not combining with other elements under normal reaction conditions ;
specifically , {
helium }, {
neon }, {
argon }, {
krypton },
{
xenon },
or {
radon };
also called {
inert gas }.
{
Noble metals } (
Chem .),
silver ,
gold ,
and platinum ; --
so called from their resistance to oxidation by air and to dissolution by acids .
Copper ,
mercury ,
aluminium ,
palladium ,
rhodium ,
iridium ,
and osmium are sometimes included .
[
1913 Webster ]
Syn :
Honorable ;
worthy ;
dignified ;
elevated ;
exalted ;
superior ;
sublime ;
great ;
eminent ;
illustrious ;
renowned ;
stately ;
splendid ;
magnificent ;
grand ;
magnanimous ;
generous ;
liberal ;
free .
[
1913 Webster ]
Xenon \
Xen "
on \ (
z [
e ^]
n "[
o ^]
n ;
z [=
e ]"
n [
o ^]
n ),
n . [
Gr .
xe `
non ,
neut .
of xe `
nos strange .] (
Chem .)
A very heavy ,
inert gaseous element of the noble gas group ,
occurring in the atmosphere in the proportion of one volume is about 20 millions .
It was discovered by Ramsay and Travers in 1898 .
It can be condensed to a liquid boiling at -
107 [
deg ]
C .,
and to a solid which melts at -
111 .
9 [
deg ]
C .
Symbol Xe (
formerly also X );
atomic number 54 ;
atomic weight 131 .
3 .
[
Webster 1913 Suppl .
PJC ]
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