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According to classical mechanics, it is bound to radiate electromagnetic waves, but according to quantum mechanics, electromagnetic waves are one by one, to radiate electromagnetic waves, only to reach the energy of an electromagnetic wave, can be radiated, and the electron moves around the nucleus, according to the principle of changing the electric field to produce a changing magnetic field, this energy is too small and too small, and it cannot reach a part of the energy at all, so it will not radiate electromagnetic waves Theory and practice have proved that quantum mechanics is correct.
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No. In Newtonian classical mechanics, any object with acceleration emits electromagnetic waves, so it was greatly challenged when Rutherford proposed the current electronic model. According to classical mechanics, electrons lose energy due to the emission of electromagnetic waves, and if this happens, the electrons will gradually slow down and eventually crash into the nucleus.
But many experiments, such as Rutherford's Alpha particle scattering experiment, proved Rutherford's theory, and the physics community was thrown into controversy.
It wasn't until Einstein came up with a new theory that solved the problem, and Einstein's theory proved that Newton's classical mechanics was not suitable for the microscopic world, and the problem was solved.
Until now, nothing has been found wrong with Einstein's theory.
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No. Just look for a little popular science reading on quantum physics. Bohr postulates that the movement of electrons in orbit is not radiated.
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Electrons are only emitted or absorbed by electrons when there is an energy level transition.
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Summary. It is determined by the angular momentum of the electron, the larger the angular momentum of the electron, the higher the energy level, the more energy released, when the electron absorbs light energy (the photon should have mass) the angular momentum of the electron will become higher, the electromagnetic magnetic field should be composed of a boson, so energy and mass can be converted to each other, the process of heat conduction from a high temperature object to a low temperature object is also a process of mass propagation, but the mass is very small and negligible.
In classical electromagnetic theory, why does the movement of electrons around the nucleus release energy outward? Annoying to explain in detail.
It is determined by the amount of angular momentum of the electron, the larger the angular momentum of the electron, the higher the energy level, the more energy is released, when the electron absorbs light energy (photons should have mass), the angular momentum of the electron will become higher, the electromagnetic magnetic field should be composed of a boson, so energy and mass can be converted to each other, the process of heat conduction from a high temperature object to a low temperature object is also a process of mass propagation, but the mass is very small and negligible.
Can you tell us more about that?
Many people simply think that the energy of the atom is determined by the angular momentum of the electrons outside the nucleus, it is not right, the nucleus and the electrons outside the nucleus are the whole, and they can maintain the macro stability of the elements by checking and balancing each other, when the atom receives and releases energy, the electrons outside the nucleus and the nucleus are carried out at the same time, for example, the X and Y rays emitted by unstable radioactive elements are emitted by the nucleus (the bosons such as the intersons in the nucleus are emitted by the mass converted into energy), Of course, radioactive elements will decay and lose their mass after emitting a certain amount of X or Y rays, and some low-quality elements will also be converted into high-quality new elements after being exposed to radiation by rays, and more than 99% of the mass of the atom is determined by the nucleus, so the core of the energy conversion is the nucleus rather than the electron, and the electron can be generated and annihilated with the energy of the nucleus, as if there is a positive charge, there will naturally be a negative charge to counteract, until the equilibrium, the element will be stable.
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The movement of electrons around the nucleus of an atom is similar to the movement of the Moon around the Earth. There are rotations and revolutions, and revolution is to rotate around the entire atom with a certain trajectory and speed, which is to rotate itself.
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Electrons move by the mutual gravitational pull of the nucleus, the electromagnetic force, and the dark energy.
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Electrons orbit around the nucleus outside the nucleus. The nucleus is positively charged and the electrons are negatively charged.
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Because electrons have wave-particle duality, that is, the position and motion state of electrons cannot be determined at the same time. So it is not possible to determine exactly where the electron is around the nucleus, but only what is the probability of it being at a certain position.
The electrons are negatively charged and the nucleus is positively charged, and they attract each other due to the action of electromagnetic force, and have a gravitational force, and because the electrons run around the nucleus at high speed to produce centrifugal force, the centrifugal force and the electromagnetic force balance each other, so that the electrons remain above a certain distance from the nucleus and cannot get close to the nucleus.
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Summary. No, the motion of electrons around the nucleus is a physical phenomenon in which electrons move around the nucleus and is caused by the charge of the nucleus and the charge of the electron, and the electron, after being electrified, will be affected by the electric field, not the charge of the nucleus, so it will not move around the nucleus.
No, the movement of electrons around the nucleus is a physical phenomenon in which electrons move around the nucleus, which is caused by the charge of the nucleus of the proto-clump and the charge of the electrons that permeate the electrons, and the electrons, after being energized, will be stimulated by the action of the electric field, not the charge of the nucleus, so they will not move around the nucleus.
Excuse me, but please go into more detail?
When energized, the electrons move around the nucleus. This is because electrons are subjected to the force of the electric field in the electric field, resulting in motion. Workaround:
1.Increase the energy of the movement of the electrons to reduce the possibility of the electrons moving around the nucleus. 2.
Increase the charge of the electrons to reduce the likelihood of the electrons moving around the nucleus. 3.Increase the mass of the electrons to reduce the likelihood of electron motion around the nucleus.
Personal Tips:1When dealing with the problem of electron motion around the nucleus, it is necessary to pay attention to the movement energy, charge, and mass of the electron to reduce the possibility of the electron motion around the nucleus.
2.When dealing with the problem of electron motion around the nucleus, it is necessary to pay attention to the trajectory of the electron motion to reduce the possibility of the electron motion around the nucleus. 3.
When dealing with the problem of electron motion around the nucleus, it is necessary to pay attention to the electric field of the electrons to reduce the possibility of the electron motion around the nucleus. Related knowledge: The motion of electrons around the nucleus refers to the phenomenon that electrons are subjected to the force of the electric field in the electric field, resulting in motion.
The likelihood of an electron moving around the nucleus depends on the energy, charge, and mass of the electron, as well as the trajectory of the electron and the strength of the electric field.
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Electrons will have an electric field if they do not move, and the directional movement of electrons is equivalent to an electric current, and a magnetic field will be generated around the current.
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The movement of electrons is more complex, not a simple circular motion, and the basic particles have wave-particle duality.
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The motion of electrons creates a toroidal current, which, as we know, creates a magnetic field in the surrounding space.
If the electrons move in a uniform circular motion, a steady loop current is generated, and the magnetic field generated by it will not change, so that the magnetic field cannot excite the electric field.
If the rate of electron motion is changing, the current generated is not stable, and the magnetic field generated around the current ring will also change, and the changing magnetic field will produce a vortex electric field around it, and the changing vortex electric field will further excite the vortex magnetic field in the space around it, so that the mutual excitation will produce an electromagnetic field propagating in space, that is, electromagnetic waves.
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The electrostatic field is generated by an electric charge and has nothing to do with the magnetic field.
The motion of the charge creates a magnetic field. If the charge is moving uniformly, a stable magnetic field is generated. If it is inhomogeneous (i.e., the second derivative of the electric field e is not 0 for time), a changing magnetic field will be generated.
The changing magnetic field, in turn, produces an electric field. In this way, under certain conditions, the changing electric field produces a magnetic field, which in turn changes.
An electric field is generated. And so on and so forth, spreading far away.
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1.You agree that every particle has a limit speed?
2.Objects of different masses have different speeds of extreme motion.
3.Then the electrons move in a circle around the nucleus, and the speed of the movement of the object under this circumferential radius is you can imagine, and the motion of matter in the microscopic world is basically a state of extreme velocity motion.
That is to say, the ultimate velocity of an object of each mass is quantitative, and if the ultimate velocity of this object changes, then its mass will also change accordingly. As you mentioned, if the radius of motion of an electron moving in a circular motion changes, the velocity changes, and the mass changes accordingly, then this change in mass is reflected in electromagnetic wave radiation or absorption.
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According to Bohr's theory, the possible orbitals of electrons outside the hydrogen nucleus are rn=n2r1 (rn is equal to n2 times n) and r1 = m (r1 is equal to 10 times 10).According to the centripetal force of the electron around the nucleus is equal to the Coulomb force between the electron and the nucleus, the velocity of the electron around the nucleus v=((ke2) (mr1))1 2 can be calculated, and the data is substituted to obtain v1=meter seconds (v1 is equal to the 6th power of 10 meter seconds); The same can be obtained in the first section.
2. The velocity of motion at the third energy level v2 = meter seconds ( v2 is equal to the 6th power of 10 meter seconds); v3 = meter second (v 3 is equal to the 6th power of 10 meter seconds) From the above figures, it can be seen that the farther the electron is from the nucleus, the smaller its velocity indicates that the speed at which the electron moves at high speed outside the nucleus is not fixed.
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1. When the electron is not observed, its form is not a particle, but a probability cloud that exists in a wave function form that cannot be understood by humans within a certain spatial range.
2. In fact, electrons do not revolve around the nucleus, but wrap around the nucleus in the form of a probabilistic cloud.
So, you think the atom is like this:
But it's not.
The true atomic form actually looks like this:
Hydrogen atom electron cloud, these sparse and dense small black dots actually represent an electron, and the density of the point is the probability of the occurrence of this electron, the probability of occurrence in dense places is high, and the probability of occurrence in sparse places is low.
Below, is the morphology of the electron cloud of hydrogen atoms at various energy levels:
In other words, the electron does not move around the nucleus, but its probability cloud vibrates at different wavelengths and frequencies corresponding to the energy levels.
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The velocity of the electrons around the nucleus is v 1000 km sec.
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In fact, it cannot be considered that the electronic stool dust judgment is moving in an orbit outside the nuclear one.
For microscopic particles, we can no longer describe the motion of particles in terms of Newtonian kinematic quantities such as position and velocity, let alone have orbits. We can only describe particles in terms of chance, such as the probability that a particle will exist somewhere. The so-called orbital should actually be understood as the electron is in a state of probability distribution outside the nucleus.
The electrons are stable in this state and do not radiate electromagnetic waves, but radiate electromagnetic waves when they change from one probability distribution to another (i.e., the classical transition from one orbital to another).
So, the reason why you have such doubts is because you are still imagining microscopic situations with classic images. Only after you have learned quantum mechanics can you really understand the microscopic physics.
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Categories: Education, Science, >> Science & Technology.
Problem description: Why do electrons always revolve around the nucleus?
What is Energy?
Analysis: The crux of the matter is that, according to classical electrodynamics, charged particles moving faster radiate electromagnetic waves, which are light, which carry energy. The electrons revolving around the nucleus are in an accelerated motion, and if it radiates energy, it will inevitably lose energy and collapse into the nucleus.
However, the reality is that atoms are very stable. In order to uncover this phenomenon, Bohr, the guru of quantum mechanics, put forward the basic hypothesis that classical electrodynamics is not applicable in the microscopic realm, and that electrons do not fall into the nucleus.
As for why this is so, Bohr cannot explain it, but using this hypothesis, all microscopic phenomena can be explained. It can also be said that this seemingly strange phenomenon to us, the assumption that contradicts our daily concepts, is the true origin of the world, and the phenomena we usually see in the macrocosm, and thus form a concept that we take for granted, are not actually the truth. Just as we think that an electron must have an energy ** in order to exist in an atom, the truth is that it doesn't need to have **, it has this energy itself.
The strange phenomena of quantum mechanics have had an extremely significant and far-reaching impact on the development of philosophy.
In classical mechanics, it is an irregular motion according to the atomic cloud
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