一道英文的物理题When a proton captures an electron,a photon with anenergy of 13.6 eV is emitted.What is the frequency of thisphoton?Does it lie in,above,or below the visible range?答案 当一个质子捕获一个电子时,会发射出一个具有13.6电子伏能量的光子,请问这个光子的频率是多少?它是否在可见光...
The charge of a single electron is referred to as the unit electrical charge. It carries a negative charge that is equal to but opposite the positive charge on a proton or hole. However, the amount of electrical charge is usually not measured on a single electron because that amount is so...
the smallest unit of a compound c. always made of carbon d. smaller than an electron Which element has the smaller radius: Li or Na? Explain. Which is the less metallic element? (a) Na (b) Cs. Which is the less metallic element? (a) Sn (b) Sb. What group of elemen...
heavier than an electron, which carries a negative electric charge. Positive and negative charges attract each other. Neutron : a tiny subatomic particle with no electrical charge, having exactly the same mass as a proton. Nucleon : Protons and neutrons are sometimes called “nucleons”. ...
What is electron density? How does a molecule differ from an atom? How is an atom different from an element? What is an oxygen-18 atom? What value is closest to the mass of the atom? Describe the atomic structure of the atom and its subatomic particles. ...
In contrast,metal has so many conduction electrons that it is difficult to change its conductivity by modulating its electron concentration. In the other extreme,insulator has so few electrons that its conductivity cannot be modulated significantly at all. To summarize,a semiconductor is a solid ...
An electron microscope is a type of microscope that uses electrons rather than photons — as a conventional light microscope does — for imaging. Because electrons have a much smaller wavelength than photons, they provide much greater magnification. Electrons are the tiny “satellites” that orbit ...
ahaveawork haveawork[translate] aWe wish you gold in store. 我们在商店祝愿您金子。[translate] athis is we classroom 这是我们教室[translate] aThe electron is therefore very responsive indeed to electric and magnetic fields. 因此电子对电和磁场的确是非常敏感的。[translate] ...
But the number of holes is quite smaller than that of electrons because holes are created only due to the breakdown of the semiconductor to semiconductor covalent bond whereas free electrons are created both due to loosely bounded non-bonded fifth valence electron of impurity atoms and breakdown of...
What is reaction time in science? What causes space-time compression? What is the speed of the electron in its orbit? Does the charge of a particle warp space-time? How far does particulate matter travel? How can the speed of a mechanical wave be calculated?