The electrons within an atom of element"X" oscillate with a

How many electrons does ground-state Kr have with both n = 3 and l =

英语翻译
The method normaaly employed for free electrons produced in electron tubes is thermionic emission in which advantage is taken of the fact that if a solid body is heated sufficiently,some of the electrons that it contains will escape from its surface into the surrounding space

关于配位体化合物的问题
How many unpaired electrons are there in the hexabromomanganate(III) anion?
在[Br6Mn]-3里有多少个未成对电子?
a.1
b.3
c.5
d.2
e.4
Mn失去的3个电子是和Br形成配位键了么？

.比较状语从句中的倒装
The greater the number of the free electrons in a material, the better is the conductivity of the material.
看不明白，请大神分析主谓宾状！
句子结构？

Are electrons embedded in the atom
我问的是电子是不是embed in the electron
I am thinking that it shouldn't ”be embedded in“

比较状语从句中的倒装
The greater the number of the free electrons in a material,the better is the conductivity of the material.
句子结构?

问道BC的化学题!
The following compound shares electrons:
a,NAOH b,CaO c,N2O3 d,CuS
- -
回答请注明过程,

英语化学题,what is the maximum number of electrons in
each of the first four energy levels?

divine energy of electrons什么意思?
是美国高三科学的内容

In which of the following bond types the electrons form a general electron cloud?
A.metallic bonding
B.covalent bonding
C.ionic bonding
D.van der Waals forces

曼哈顿语法里的句子,
Electrons are particles that physicists agree exist.
这个that是引导的宾语从句吗,修饰particle?
the physicists agree exis中的agree怎么就跟exist呢?不是俩动词吗?

原题.
Estimate the number of electrons in human body,assuming that it is made only of water and weighs 70 kg.
(additional information:the molar mass of water is about 18 g/mol,which means that in 18 g of water the number of molecules equals to the Avogadro constant,6.02X10.One molecule of water ,H2o consists of two atoms of hydrogen and one atom of oxygen.Hydrogen has one electron,oxygen has 8.)
google 翻译.
估价在人体中的电子的数目,假设,它是由水和重量70千克.
（附加信息：水的摩尔质量是约18克/摩尔,这意味着,在18克的水分子的数目等于阿伏伽德罗常数,6.02X10.One的水分子,H 2 O由两个氢原子和一个氧原子,氢,一个电子,氧有8个）.

1.How many electrons have removed from a positively charged pith-ball electroscope if it has a charge of 7.5×10^-11C?
2.What is the charge in coulombs on an object that has
(1)An excess of 6.25×10^19 electrons?
（2）An deficiency of 1.0×10^8 electrons?

翻译electrons can move from one atom to another这句话,重点是"move from"这句话.

求解释以下句子修改是否正确?
Electrons are particles physicists AGREE TO EXIST.
这是曼哈顿语法中的错句,错误的原因是agree to exist不是常用的惯用语,但我查词典后发现有agree to do sth.这种用法的,所以就不明白它为什么是错的了
如果改成Electrons are particles that physicists AGREE TO EXIST.
这个句子是否就是正确的呢?

1eV 的问题
我有个地方想不明白 请高人解答
1 Coulomb= 6.28*10^18 electrons
1J =1w *1 s
=1A*1V*1s
=1C*1V
= 6.28*10^18 eV
上面是我的推导 可是书上写的是
1J= 1/1.609*10^18 [eV]=6.215*10^18[eV]
请解释一下我错在哪里 书上这个又是怎麼来的

What is the maximum number of electrons in an atom
that can have the following quantum numbers?(a) n = 2;
(b) n = 3 and ,= 1; (c) n = 3,,= 1,and m,= 0; (d) n = 3,
,= 1,m,= −1,and ms = −1/2.

英文词汇：molecules,nucleus,protons,neutrons,electrons一定要加S么,为什么.还是一般情况?atom呢?

什么是the duality of the nature of electrons?
最好有中英文的答案,

英语翻译
The distribution of electrons in atoms,molecules,andsolids determin nearly all of their physical and chemical properties,withstructure and reactivity being those of greatest interest to the chemist.

英语翻译
1 ,all orbital hold a max of 2 electrons.An orbital containing 2electrons is called a filled orbital
2,Electros occupying the same orbital must have oppisite spin,indicated with arrow ↑↓.
3,electrons fill up orbitals at the lowest energy sublevels first.
4,the lowest or most stable arrangement of electrons in a sublevel is the one with the greatest number of parallel spins(this is Hund` rule)this means when orbitals of the same energy are available ,electrons will avoid pairing if possible ,by entering separate sub-orbitals.
这是第一段了.
还有啊...辛苦了..
the general trend in ionisation energy is for an increase across each period due to the increaseed effective nuclear charge on the valence electrons.However ,we need to explain these first ionisation eneygies that do not follw this trend.
B(硼) has a lower first ionisation energy than Be(pi) the 2p orbital is slightly further from the nucleus than 2s and this greater distance out-weighs the increased effective nuclear charge on the valence electtrons .Thus less energy is required to remove boron`s least toghtly held electrons..
就这么多了 、.

这书上说：the sharing of the bonding electrons in water is equal不对
为什么啊

英语翻译
What fraction of the current is carried by the electrons in the intrinsic GaAs at 27℃?

求解几道英文化学题
1）The binding energy of electrons to
copper metal is 383.0 kJ/mol. What is the longest wavelength of light that will
eject electrons from copper metal? Enter units
2）Microwave ovens heat food by creating microwave electromagnetic radiation that
is absorbed by water molecules in the food. Any material that does not have
water in it will not absorb the radiation and will not get hot. Metals reflect
the microwaves from their surfaces and disrupt the operation of the oven. Some
Australians heat water in microwave ovens to make tea. What is the minimum
number of microwave photons with a wavelength of 3.22 mm that will have to be
absorbed by a 122.00 gram sample of water to heat it from 25°C to 100°C? (It
requires about 315 joules of energy to heat 1 gram of water 75°C)
3）What is the wavelength (in nm) of an electron with v = 9.2x 105
m/s?
4）Calculate λ (in nm) for a photon with E = 2.83x10-15 J?
5）Give the number of unpaired electrons in F−.