--Are you sure that your electron is really lost?--I'm posit

I have promised that my daughter ________ get a new electronic dictionary on her next birthday.
A.should B.must C.shall D.would

化学电子问题~~大虾帮帮忙~
which of the following electron configurations correspond to an excited state?Identify the atoms and write the ground-state electron configuration where appropriate
a.1s2 2s2 3p1
b.1s2 2s2 2p6
c.1s2 2s2 sp4 3s1
d.[Ar]4s2 3d5 4p1
how many unpaired electrons are present in each of there species?
exicted state是什么?

How fast of the speed of the electron which in an atom?
As we know,the speed of light is the ultimate speed in the universe,
then i would like to know how about the electron of an atom,
according to heisenburg's uncertainty principle,
the more you know the position of a particle, the less you can know about its velocity, and the more you know about the velocity of a particle, the less you can know about its instantaneous position.
It seems the speed of electron in an atom can not be measured,whle the speed of light can be measured.
Then which speed is faster? electron or photon?

In one model of the hydrogen atom,the electron revolves in a circular orbit around the proton with a speed of 2.0106m/s.Determine the radius of the electron's orbit.

英语翻译
The nuclear charge experienced by an electron is reduced by shielding by other electrons

What is the difference of electron affinity and electronegativity?请提供英文答案

化学专业英语翻译^
Electron dot formulas clarify the mechanism of forming a coordinate bond in the neutralization of a Lewis acid. Neutralization of a proton by an ammonia molecule is A
The acid — base pair Al3+ and H2O undergoes Lewis neutralization by forming six coordinate bonds.
Many displacement reactions illustrate the relative strength of the Lewis acid or base. For example, the cyanide ion is a stronger base than the fluoride ion by virtue of its ability to displace the fluoride ion from the hexafluoroferrate (III) ion: FeF63- + 6CN- ------→ Fe(CN)63- + 6F-
There are many reactions that fit the Lewis acid-base concept. In contrast to proton loss or gain in the Bronsted-Lowry concept, the Lewis concept emphasizes the electron pair ------a Lewis acid lacks an electron pair in an empty orbital, or has an orbital that can be vacated and a Lewis base has a nonbonding electron pair and can supply this pair to another substance lacking an electron pair.
It is evident that the Lewis concept applies, not only to the chemical behavior correlated by the Bronsted-Lowry concept, but also to many chemical reactions that do not involve proton transfer, and for this reason it is most useful. Its generality precludes the establishment of a scale of acid and base strengths for all Lewis acids and bases, but comparisons can be made between selected substances.
The terms nucleophilic, and electrophilic are sometimes applied to bases and acids. Lewis acids that accept an electron pair are electrophilic, and the strength of Lewis bases is measured by their tendencies to supply electrons. For example,H2O is a stronger base than Cl- because H2O displaces Cl~ in supplying an electron pair for the proton:
HCl+H2O------→H3O+ + Cl-
Consequently , H2O is a stronger nucleophilic agent than Cl-.
哎，不知道这次有没有人来答，我已经N次提问了，呜....
救命啊。。。。。帮帮我！= =||、

Nowadays, _______ cars are more and more popular. A．electronic B．electric C．electrical D．electricity

又一道物理题,英文版,
Consider an electron trapped in an infinite well whose width is 98.5pm .If it is in a state with n=15,what are (a)its energy(b)The uncertainty in its momentum(c)The uncertainty in its position.
最好有个方程，好看一点

英语翻译
For r< rc,one may alter the all-electron wave function as one wishes,
within certain limitations,and retain the chemical accuracy of the problem.
For computational simplicity,we take the wave function in this region to be
smooth and nodeless.Another very important criterion is mandated.Namely,
the integral of the pseudocharge density,i.e.,square of the wave function
|φp(r)|2,within the core should be equal to the integral of the all-electron
charge density.Without this condition,the pseudo-wave function can differ by
a scaling factor from the all-electron wave function,that is,φp(r)=C×ψAE(r)
for r >rc where the constant,C,may differ from unity.Since we expect the
chemical bonding of an atom to be highly dependent on the tails of the valence
wave functions,it is imperative that the normalized pseudo wave function be
identical to the all-electron wave functions.The criterion by which one insures
C = 1 is called norm conserving [2].

电子的速度和波长有关?
An electron travels with a velocity equal to 8.7x10^1 % of the speed of light in vacuum.Calculate its associated wavelength in Angstrom.
Note:Your answer is assumed to be reduced to the highest power possible.

一道英文化学题
Find the velocity of an electron emitted by a metal whose threshold frequency is 2.07×1014 when it is exposed to visible light of wavelength 5.24×10m.

英语翻译
2.9.Scanning electron microscope (SEM)
The C.albicans KCTC7122 was resuspended in PBS,to a final concentration
of 108 cells/ml.200 ll aliquots of C.albicans suspension
were incubated with 22 ll of 250 lg/ml di-K19Hc.For a control,the
same amount of C.albicans suspension was mixed with 22 ll of
0.01% acetic acid and incubated for 5 min at 30 2C.The di-K19Hctreated
or untreated C.albicans samples were then fixed in 0.05 M sodium
cacodylate buffer (2% glutaraldehyde,2% paraformaldehyde,pH
7.2) for 4 h.After fixation,the samples were centrifuged at 2000 rpm
and rinsed three times for 20 min each with sodium cacodylate buffer.
The samples were then dehydrated through a graded ethanol series
(50%,70%,90%,95%,100% ·2),for 30 in each.The samples were
freeze-dried for 8 h,and coated with a light coat of gold palladium.
The specimens were then viewed with an S-2400 scanning electron
microscope (Hitachi,Japan).
3.Results
3.1.Peptides
The primary amino acid sequences of the synthetic halocidin
congeners used in this study,di-K19Hc and K19Hc,are shown
in Table 1.Table 1 also provides the sequences of P18 and
buforin II,used as the standard peptides in this study.

英语翻译
Electron transfer at each step of the respiratory chain is not completely efficient,resulting in the escape of electrons that reduce O2 to superoxide anion,which is converted to hydrogen peroxide by the action of manganese superoxide dismutase.These reactive oxygen species (ROS) have the potential to damage lipids,proteins,and nucleic acids,leading to cellular dysfunction or death.
Electron transport chain activity appears to be optimized for physiological PO2 and deviations from normal PO2 (in either direction) are associated with increased ROS production.The utilization of O2 for energy metabolism is a two-edged sword:the complete oxidation of glucose to CO2 and H2O greatly increases the yield of ATP as compared with the incomplete oxidation of glucose to lactate; however,the transfer
of electrons poses an inherent risk of ROS production.As a result,the cellular O2 concentration must be very tightly regulated through homeostatic mechanisms that control O2 delivery and O2 utilization.

AP 关于核外电子排布
Provide the electron configurations for Cr and Cu then explain why we see a half filled d-shell for Cr and a fully filled d-shell for Cu even though there is an open s-orbital position available.

For an electron in a circle with diameter of 2 Å,Find the wave-functions and energy levels.

美国大学物理题 HELP!
Problem 4.A proton and an electron are far apart at rest.An external agent brings the electron and proton closer together and then holds them at rest.Which statement is correct about the work done by the external agent?
A) The work done is negative.
B) The work done is positive.
C) The work done in this case is zero because the proton and the electron will spontaneously come close to each other even without any external force.
D) None of the above.

Probably you have seen someone reading a book on an electronic reading device. Over the past few years, these small computers have become more popular. For that reason, more companies that make 小题1: paper books are now making electronic books (e-books). Most e-books are the same as paper books, 小题2: people download a file into a reading device rather than 小题3: the paper book. This way they can 小题4: many books. Books companies are adding special features 小题5: some e-books. These extra features might include sound files, picture files, or video files. When the readers click on these files they learn more about the book, the story, or the writer. The latest electronic readers are smaller and 小题6: , but they are also much more powerful. They can store much more information, so writers and book companies can do more with 小题7: e-books. They do not want to just add files to 小题8: completed book. They are making the sound, picture, and video files part of the story. Readers need these files to understand the whole story. Readers can 小题9: change the story. Readers already have a lot of books to 小题10: from. If they can change the way stories end, they will have more choices!

英语翻译
我们公司做太阳能电池,充电器的,有很多electronic,electron,electrical,eletrics,我们公司目前用的是electron,作为名词,但是为了修饰后面的COM,是不是该用形容词呢?现在好多公司都用了很多ele开头的,谁能给出这几个词的区别呢?

看看语法有没有错误
Shenzhen Konsta Electron Co.,Ltd.is a high-tech enterprise manufactures Home Electronic Appliances and Auto Electronics.

一道英文的物理题
When a proton captures an electron,a photon with an
energy of 13.6 eV is emitted.What is the frequency of this
photon?Does it lie in,above,or below the visible range?

短文填词
Have you ever fed an electron pet?If not,I shall teach you how to feed an electron pet.There are many kinds of pets for you to choose,such as cats,dogs,and so on.But do remember,they are not real animals,they are just electronic toys.In the (b ),your pet may be an egg or very small.So you'd better feed the pet with food and water.Of coursethe food and water are meal.After meal,You will have to talk with your pet and play games with them.Atnight,do not(f) to turn off the lights,other wise,it will cry for a long time.Doing this needs great patience,but it's really very interesting,isn't it?

电子电量和质量之比是多少?急!
what is the electron charge-over-mass ratio?
是多少啊?
急

想请教一道化学的判断题
When an atom has an excited electron drop to a lower available energy state,it emits energy in the form of a photon
True or False

英语翻译
Scanning electron microscopy (SEM)
(JEOL JSM-5800LV model) was performed on the samples.Specific
surface area (SSA) of the samples was also analyzed by Autosorb-1
analyzer using BET method.Cation exchange capacity (CEC) of the
samples was measured according to Schollenberger,using
neutral NH4OAC and 10% NaCl as saturating and replacing solu-
tions,respectively.

英语翻译
Two pass and three pass bead-over-bead (BoB) electron beam weld technique was attempted on Ti6Al4V to improve its Charpy impact and fracture toughness of weld metal portion.Hardness and microstructural studies were also done to support the findings.The hardness values of the weld metals were found to be higher than their base metal counterpart.The weld metal hardness came down when deposited with bead-over-bead technique.Conventional stringer bead welding caused reduction in Charpy impact toughness compared to its base metal counterpart.Bead-over-bead technique improved the notch toughness of weld metals.The fracture toughness values of the weld metals were found to be superior to that of base metal.This is in contrast to the Charpy impact toughness values where the impact toughness of base metal was better than the stringer and bead-over-bead weld metals.The better fracture toughness of weld metals was related to the basket-weave structure compared to the equi-axed structure of base metal.Bead-over-bead technique was found to help in improving the fracture toughness of weld metal further.Overall,the study showed that the bead-over-bead technique improved both notch toughness and fracture toughness of Ti6Al4V electron beam weld metals.

关于德布罗意波长的问题,急,
The wavefunction for a free electron,i.e.one on which no net force acts,is given by ψ = A sin(1.16x1010x) where x is in meters.Compute the electrons momentum in kev/c to three significant figures.
我不知道那个波函数是干什么用的,能从其中得到什么,我知道德布罗意函数公式,要求动量得知道波长,那个公式是不是用来求德布罗意波长用的?

英语语法
it was rather like an exhibition of prehistoric electronic equipment.这里的副词rather修饰的是什么成分?
这句话中的like是介词还是动词，副词可以修饰介词吗？

英语翻译
This command allows you to define the Electron Density to be used for calculating dose using the Convolution dose algorithm by selecting a CT image study.
不要谷歌翻译的啦！

英语翻译
2.3.Scanning electron microscopy (SEM)
Nanoparticles in solution were dropped onto a silica surface precoated with a thin layer of gold and palladium.The nanoparticles were lyophilized using a JFD-310 (JEOL,Japan) prior to analysis,and micrographs were obtained using a SEM (JSM-6360,Japan).

英语达人,我又来了啊,
An electron tube is a device that can block,amplify,or act as an on/off switch for an electric current.好像没有switch for 的词组吧,也就是说 这几个功能都是for an electric current 的.比如 block for an electric current ,amplify for an electric current ,act as an on/off switch for an electric current.是不是?我语法很烂!

Such electron tubes ________ in a radio set are also found in a TV set.
A.that we use B.as we use C.as we use them D.that we use them
为什么选B不选A.as 跟that的用法有什么不同?
32.I hate to see papers _______ in pencil.
A.writing B.to write C.written D.write
如果是被写怎么没有be呢?
34.This is the second time she ______ improvement on that equipment.
A.had made B.made C.is making D.has made
为什么选D?
._______determines a good meal varies from country to country.
A.What B.That C.It D.Which
A/B/C选项怎么区分啊?
． Arabic is a language I found ________ to learn.
a.it difficult b.that difficult c.difficult it d.difficult
19． The fact ________ shows that he was never really serious about coming.
a.that he didn’t turn up b.which he didn’t turn up
c.he didn’t turn up d.for him not to turn up
为什么选A?
． ________,he’ll make a first-class tennis player.
a.Giving time b.To give time
c.Given time d.Being given time
为什么选C?
Professor Black had us ________ compositions every Friday.
a.to write b.written
c.write d.writing
为什么选C?

英语翻译
1.Hangzhou Ponder Electron Co.,Ltd.
2.Hangzhou Pindar Electron Co.,Ltd.

一道SAT2化学题
Which of the following electron configurations represents an atom of magnesium in an excited state?
A.1s2 2s2 2s6
B.1s2 2s2 2p6 3s2
C.1s2 2s2 2p5 3s2 3p2
D.1s2 2s2 2p6 3s1 3p1
E.1s2 2s2 2p6 3s1 3p2
为什么?

英语翻译
CELLULAR PROCESSES
Atp Synthase
Electron Transport Chain
Protein Trafficking
Protein Modification
Protein Recycling
Insulin Signaling
Constitutive Secretion
Regulated Secretion
Mitochondrial Protein Transport
Photosynthesis (Light)
Photosystem II
Mitosis
Meiosis
MOLECULAR PROCESSES
Transcription
Regulated Transcription
mRNA Processing
mRNA Splicing
Translation
Lac Operon
Glycolysis (Overview)
Glycolysis (Reactions)
有的生物学名词翻译软件不会翻译