electron 音標拼音: [ɪl'ɛktrɑn]
n . 電子
電子
electron 電子
electron 電子
electron n 1 :
an elementary particle with negative charge [
synonym :
{
electron }, {
negatron }]
lepton \
lepton \
n . (
Physics )
an elementary particle that participates in weak interactions but does not participate in the strong interaction ;
it has a baryon number of 0 .
Some known leptons are the {
electron },
the {
negative muon },
the {
tau -
minus particle },
and the neutrinos associated with each of these particles .
[
WordNet 1 .
5 PJC ]
Electron \
E *
lec "
tron \,
n . [
NL .,
fr .
Gr . '
h `
lektron .
See {
Electric }.]
1 .
Amber ;
also ,
the alloy of gold and silver ,
called {
electrum }. [
archaic ]
[
1913 Webster ]
2 . (
Physics &
Chem .)
one of the fundamental subatomic particles ,
having a negative charge and about one thousandth the mass of a hydrogen atom .
The electron carries (
or is )
a natural unit of negative electricity ,
equal to 3 .
4 x 10 ^{-
10 }
electrostatic units ,
and is classed by physicists as a {
lepton }.
Its mass is practically constant at the lesser speeds ,
but increases due to relativistic effects as the velocity approaches that of light .
Electrons are all of one kind ,
so far as is known .
Thus far ,
no structure has been detected within an electron ,
and it is probably one of the ultimate composite constituents of all matter .
An atom or group of atoms from which an electron has been detached has a positive charge and is called a {
cation }.
Electrons are projected from the cathode of vacuum tubes (
including television picture tubes )
as {
cathode rays }
and from radioactive substances as the {
beta rays }.
Previously also referred to as {
corpuscle },
an obsolete term .
The motion of electrons through metallic conductors is observed as an electric current .
A particle identical to the electron in mass and most other respects ,
but having a positive instead of a negative charge ,
is called a {
positron },
or {
antielectron }
[
Webster 1913 Suppl .
PJC ]
Electro -
negative 58 Moby Thesaurus words for "
electron ":
Kern ,
NMR ,
alpha particle ,
antibaryon ,
antilepton ,
antimeson ,
atom ,
atomic nucleus ,
atomic particle ,
baryon ,
beta particle ,
cathode particle ,
electron affinity ,
electron cloud ,
electron pair ,
electron shells ,
electron spin ,
electron transfer ,
electron -
positron pair ,
elementary particle ,
energy level ,
excited state ,
extranuclear electrons ,
ground state ,
ion ,
lepton ,
lone pair ,
meson ,
molecule ,
monad ,
negatron ,
neutron ,
nuclear force ,
nuclear magnetic resonance ,
nuclear particle ,
nuclear resonance ,
nucleon ,
nucleosynthesis ,
nucleus ,
octet ,
orbital electron ,
photoelectron ,
photon ,
proton ,
quark ,
recoil electron ,
secondary electron ,
shared pair ,
strangeness ,
strong interaction ,
subvalent electrons ,
surface -
bound electron ,
thermion ,
triton ,
valence electron ,
valence electrons ,
valence shell ,
wandering electron
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