Fe 音标拼音: [f'e]
铁
铁
Fe n 1 :
a heavy ductile magnetic metallic element ;
is silver -
white in pure form but readily rusts ;
used in construction and tools and armament ;
plays a role in the transport of oxygen by the blood [
synonym : {
iron }, {
Fe }, {
atomic number 26 }]
Ion \
I "
on \ ([
imac ]"[
o ^]
n ),
n . [
Gr . '
io `
n ,
neut ,
of '
iw `
n ,
p .
pr .
of '
ie `
nai to go .]
1 . (
Elec .
Chem .)
an atom or goup of atoms (
radical )
carrying an electrical charge .
It is contrasted with neutral atoms or molecules ,
and free radicals .
Certain compounds ,
such as sodium chloride ,
are composed of complementary ions in the solid (
crystalline )
as well as in solution .
Others ,
notably acids such as hydrogen chloride ,
may occur as neutral molecules in the pure liquid or gas forms ,
and ionize almost completely in dilute aqueous solutions .
In solutions (
as in water )
ions are frequently bound non -
covalently with the molecules of solvent ,
and in that case are said to be solvated .
According to the electrolytic dissociation theory ,
the molecules of electrolytes are divided into ions by water and other solvents .
An ion consists of one or more atoms and carries one unit charges of electricity ,
3 .
4 x 10 ^{-
10 }
electrostatic units ,
or a multiple of this .
Those which are positively electrified (
hydrogen and the metals )
are called {
cations };
negative ions (
hydroxyl and acidic atoms or groups )
are called {
anions }.
Note :
Thus ,
hydrochloric acid ({
HCl })
dissociates ,
in aqueous solution ,
into the hydrogen ion , {
H },
and the chlorine ion , {
Cl -};
ferric nitrate , {
Fe (
NO3 )
3 },
yields the ferric ion , {
Fe },
and nitrate ions , {
NO3 -}, {
NO3 -},
{
NO3 -}.
When a solution containing ions is made part of an electric circuit ,
the cations move toward the cathode ,
the anions toward the anode .
This movement is called migration ,
and the velocity of it differs for different kinds of ions .
If the electromotive force is sufficient ,
electrolysis ensues :
cations give up their charge at the cathode and separate in metallic form or decompose water ,
forming hydrogen and alkali ;
similarly ,
at the anode the element of the anion separates ,
or the metal of the anode is dissolved ,
or decomposition occurs .
Aluminum and chlorine are elements prepared predominantly by such electrolysis ,
and depends on dissolving compounds in a solvent where the element forms ions .
Electrolysis is also used in refining other metals ,
such as copper and silver .
Cf .
{
Anion }, {
Cation }.
[
Webster 1913 Suppl .]
2 .
One of the small electrified particles into which the molecules of a gas are broken up under the action of the electric current ,
of ultraviolet and certain other rays ,
and of high temperatures .
To the properties and behavior of ions the phenomena of the electric discharge through rarefied gases and many other important effects are ascribed .
At low pressures the negative ions appear to be electrons ;
the positive ions ,
atoms minus an electron .
At ordinary pressures each ion seems to include also a number of attached molecules .
Ions may be formed in a gas in various ways .
[
Webster 1913 Suppl .]
Symbol \
Sym "
bol \ (
s [
i ^]
m "
b [
o ^]
l ),
n . [
L .
symbolus ,
symbolum ,
Gr .
sy `
mbolon a sign by which one knows or infers a thing ,
from symba `
llein to throw or put together ,
to compare ;
sy `
n with ba `
llein to throw :
cf .
F .
symbole .
Cf . {
Emblem }, {
Parable }.]
1 .
A visible sign or representation of an idea ;
anything which suggests an idea or quality ,
or another thing ,
as by resemblance or by convention ;
an emblem ;
a representation ;
a type ;
a figure ;
as ,
the lion is the symbol of courage ;
the lamb is the symbol of meekness or patience .
[
1913 Webster ]
A symbol is a sign included in the idea which it represents ,
e .
g .,
an actual part chosen to represent the whole ,
or a lower form or species used as the representative of a higher in the same kind .
--
Coleridge .
[
1913 Webster ]
2 . (
Math .)
Any character used to represent a quantity ,
an operation ,
a relation ,
or an abbreviation .
[
1913 Webster ]
Note :
In crystallography ,
the symbol of a plane is the numerical expression which defines its position relatively to the assumed axes .
[
1913 Webster ]
3 . (
Theol .)
An abstract or compendium of faith or doctrine ;
a creed ,
or a summary of the articles of religion .
[
1913 Webster ]
4 . [
Gr . ?
contributions .]
That which is thrown into a common fund ;
hence ,
an appointed or accustomed duty . [
Obs .]
[
1913 Webster ]
They do their work in the days of peace . . .
and come to pay their symbol in a war or in a plague .
--
Jer .
Taylor .
[
1913 Webster ]
5 .
Share ;
allotment . [
Obs .]
[
1913 Webster ]
The persons who are to be judged . . .
shall all appear to receive their symbol . --
Jer .
Taylor .
[
1913 Webster ]
6 . (
Chem .)
An abbreviation standing for the name of an element and consisting of the initial letter of the Latin or New Latin name ,
or sometimes of the initial letter with a following one ;
as , {
C }
for carbon , {
Na }
for sodium (
Natrium ), {
Fe }
for iron (
Ferrum ), {
Sn }
for tin (
Stannum ),
{
Sb }
for antimony (
Stibium ),
etc .
See the list of names and symbols under {
Element }.
[
1913 Webster ]
Note :
In pure and organic chemistry there are symbols not only for the elements ,
but also for their grouping in formulas ,
radicals ,
or residues ,
as evidenced by their composition ,
reactions ,
synthesis ,
etc .
See the diagram of {
Benzene nucleus },
under {
Benzene }.
[
1913 Webster ]
Syn :
Emblem ;
figure ;
type .
See {
Emblem }.
[
1913 Webster ]
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I HATE CHAT GPT : r Rants - Reddit I HATE CHAT GPT I just need a place to vent my feelings about this atrocity, sorry I decided to try Chat GPT just for fun because I had been hearing so much about it and how smart it is and how powerful it is and all that crap Tried it out and was first impressed, than disgusted I made the idiotic mistake of asking it to write a poem
不是说chat gpt是免费的吗,怎么只能免费问一次? - 知乎 后来自己注册gpt账号,能免费使用GPT-3 5,每月20刀的Gpt-4还是不大舍得去搞,3 5基本也够用了,搭配chatpdf等其他AI工具,用起来还是很方便的。 再后来,用过微软的Bing,还有早期只支持英文的Bard(Bard现在也支持中文了),各有特色,习惯了GPT,还是用它比较多。
GPT-API-free DeepSeek-API-free - GitHub ️ 免费API Key gpt-5系列模型的推理能力较弱,若需要更强的推理能力,可以购买付费API ️ 免费API Key仅可用于个人非商业用途,教育,非营利性科研工作中。 免费API Key严禁商用,严禁大规模训练商用模型! 训练科研用模型请提前加群联系我们。
Is chatgpt pro much better than free : r ChatGPTPro - Reddit I'm getting by fine using free chat gpt and microsoft edge using copilot - which uses the latest version of paid chat gpt (is this incorrect?)…
chat GPT近 2 年更新了 7 个版本,哪个最好用? - 知乎 而GPT 4o可以做的可以更多,它可以读word文档,excel表格,ppt文件,pdf文档,各种图片等等。 这种能力赋予了它多面手的作用,因为工作中很多事情依赖于大量的文件,很难用几句话描述清楚, 而最好的办法就是通通扔给大模型,然后让它去分析。
Supported AI models in GitHub Copilot To learn how Copilot Chat serves different AI models, see Hosting of models for GitHub Copilot Footnotes GPT-5 4 nano is currently only available in the Codex Visual Studio Code extension (Copilot Pro+ only) and is not available in Copilot Chat ↩ ↩ 2 ↩ 3 MAI-Code-1-Flash is a continuously improving model
Can my professor really tell if I used chatgpt for a coding . . . - Reddit There is a need to evolve, soo the best way just to ask them to do something at a level of difficulty that should match the difficulty that existed before chat-gpt, like make them create new libs, or update existing one ! For sure a teacher knows the way to make students life misarable again heheheh if not they can always ask gpt how to do that
Chat GPT-5 的发布是否预示着程序员真正可以被替代? - 知乎 最近几天一直也在用GPT 5解决一些疑难杂症。 从23 年年底开始用AI 构建项目(最近ChatGPT帮我开发了一个小项目)到现在,用 AI 辅助编程已经接近两年。 我的评价是: 还远不到说真正替代程序员的时候。 不要被那些不写生产代码,只会跑跑demo 的营销号忽悠了。
AI model comparison - GitHub Docs Comparison of AI models for GitHub Copilot GitHub Copilot supports multiple AI models with different capabilities The model you choose affects the quality and relevance of responses by Copilot Chat and Copilot inline suggestions Some models offer lower latency, while others offer fewer hallucinations or better performance on specific tasks This guide helps you pick the best model based on