why electron revolve around nucleus?

Question

my mam said that nucleus is positive charge wherelse electron is negative charge so it revolves. opposite charge attract each other. then why electron and nucleus are not attracted?

Answer 1

The electron revolves around the nucleus because it is attracted towards the nucleus.If there was no attraction the electron will not revolve but it would fly off in a straight line. It is similar to the revolution of the moon around the earth

Answer 2

Electron and nucleus attract each other. But an electron is a quantum mechanical object which can not be localized in a mathematical point. If you want to push it into a smaller volume, you have to give it more energy. The attraction of the electron by the positive charge of the nucleus gives is some energy, enough to force it into an orbital of finite size, but not so much that it can completely "fall" towards the nucleus.

There is no revolving motion involved. That is a semi-classical picture that physicists made before they had the right idea. We have completely given up on that picture some eighty years ago. It shouldn't really be taught in schools any longer because there is nothing one can learn from it.

If your Mom says these things, does that mean you are being home schooled? If that is the case, I would suggest you and your Mom find a physics teacher or even better a real physicist to help you out with this one. Unless your Mom is a physicist herself, chances that she knows how to teach atomic theory correctly are next to nothing. That's not a criticism of your Mom's smarts. It's just a fact that these things are complicated and no layman can get them right. Heck, most physicists don't get them right the first time round.

Answer 3

In classical electrodynamics, the electron will radiate as it orbits the nucelus because it is always accelerating (acceleration is a vector concept - even though the electron's orbital speed may be constant, it is continuously accelerating becuase the velcoity vector is always changing direction). So the classical model would argue that the electron should radiate away energy and collapse into the nucleus. But that doesn't happend because we know atoms exist and they are stable. Quantum mechanics addresses this problem. There are two explanaitions - both are sort of equivalent - as to why the electron does not radiate and hence not require any additional energy to maintain an orbit. The first explanation is due to deBroglie who agrued that as long as the perimeter of the electron's obrit was an integral number of deBrolie wavelengths, then the electron wouldn't radiate and would remain in stable orbit. The other view is based on the Heisenberg uncertainty principal which basically syas you can't know exactly both the position and momentum of a quantum particle and you can't knwo exactly both the energy and the time you made the measurement of the energy of a quantum particle. So if teh electron radiates per classical theory, you'd know it's energy and you can also get a time history of the raidated energy. Both of these violate teh uncertainty principal so the electron is forbbiden to radiate by quantum mechanics. If you accept this, then you can see teh elctron has no need for a contiuous source of energy - its kinetic energy balanced by the electrostatic potential of teh nucleus is all that is required.

Answer 4

The electron (negatively charged) revolves around the nucleus (positively charged) precisely because it IS attracted. If there were no attraction, an electron would simply move in a straight line, rather than an orbit.

The Earth going around the Sun is a good analogy. The Sun's gravitational influence curves the path of the Earth into an ellipse (nearly a circle). If the Sun's gravitational pull were not there, the Earth would go in a straight line.

Answer 5

They are attracted, but the moon and the earth are attracted also, so why doesn't the moon crash into the earth? It's because the moon is also moving away from the earth, but gravity pulls it just enough so that the moon doesn't go away and not so much that the moon crashes into us. The same comparison is with the nucleus and the electron, but instead of gravity the magnetic attraction is used.

P.S. electrons revolving around the nucleus is a high school lie.... :)

Answer 6

There are equal number of particals in electron and proton. So there are no chance for electron to fell into the nucleus. The attraction between them is help to electron for moving in circuler motion.

Answer 7

Same as the solar system revolves around the milky way. Also our dna is programmed accordingly. Look in to electrons .

Answer 8

i think that the gravity of the nucleus might actually repel the electron.. i'm not sure.