why does electron revolves around  nucleous when they both r beingatrractedtowardseachother due to their charg
463572
The reality of the situation is the electron doesn't orbit around the nucleus like the earth orbits around the sun.  \n\nThe electron is in what is called the "electron cloud."  You can only say that the electron is at a certain place with a certain probability: not certainty.  \n\nTherefore, there is no way to visualize how the electron moves about the nucleus.
637538
thatoneguy is confusing alpha decay with beta decay.\n\nWhen a beta particle is released one of the neutrons of the parent becomes a proton and the electron is released to conserve charge (and carry away some mass).  The daughter recoils because of the electron and an anti-neutrino that is released during the decay.
218119
Sign conventions.  Mass is always positive, and that's the deciding factor for angular momentum.  Magnetic moment involves charge, and electrons are negatively charged, so it ends up being anti-parallel.  But, this is just an arbitrary convention, so don't get too worked up over it.  Yes, it's important for keeping your ps and qs straight in doing physics, but it's not of any major physical significance.  \n\nIf we'd decided to call electrons "positive" and protons "negative", then the magnetic moment for an electron would be parallel to the angular momentum.
332147
Those ions do follow Hund's rule, though. The d orbital looks like this:\n\n\n_________ ___________\n\n__**_______ ____*____ ___*____\n\nThe electrons are only paired when absolutely necessary.
177391
No\n\nThe reason this has\nnever happened is due to the source of magnetic fields:  moving electric\ncharges.  When electric charges (e.g. electrons) move in circles, they\nproduce a magnetic field.  In a piece of iron, it is very easy to line up\nthese circles, getting all the little magnets to work together as one big\nmagnet.\n\nFor each of these circles, one side is the north pole and one side is the\nsouth pole.  Since each circle has two sides, each circle has a north and a\nsouth pole.  Even the smallest possible magnets (spinning electrons) have a\nnorth and a south pole.
697038
This is kinda hard to draw on here...\n......_\nK--Br|\n......_\n\nThe lines around Br represent 2 electrons, and the -- represents a bond...ignore the periods
191266
Their charge is equal but a proton has a positive charge and an electron has a negative charge.
115800
I hope you are familiar with atomic theory if not get familiar and come back to this. as an electron moves it creates a wake much like a boat moving through water this wake is called a magnetic line of force. if a nother electron is encountered by this wake it will be influenced by it like a surfer on a wave. an electromagnetic fiel is the area of influence of these waves. in most materials the electrons are moving in many different directions, hence the sum field is random and weak. however if most of the electrons are coerced into a uniform movement the individual lines become coherent and combine to provide a polarised field with a stronger magnetic influence moving this fiel across an object will cause the electrons in it to surf and produce an electric current. however these surfing electrons will produce a magnetic field that is the opposite of the field they are surfing on.
585103
a positive and negitive charge attact eachother because of the electromagnetic force, which suggests that 2 charged particles will exert a force on eachother.\n\nTo find the magnetitude and direction of the force you use Coulombs law:\n\nF = (1/4πε).(q1q2/|r|²).r
1117389
in the protons: positive charge in the nucleus, and the electrons (negatively charged) orbiting around the nucleus
775698
An electron, with its negative charge, is surrounded by an electromagnetic field. Normally, in most materials, this field is canceled out by the random positioning of all of the other electrons in the material. \n\nIf these electrons are aligned, the material will become a magnet with the magnetic fields aligned toward one end of the material.\n\nIf the electrons are traveling through the material (current or electrical flow) the magnetic field will be moving with the electrons and will surround the wire (refer to "right hand rule") \nIf the wire is coiled around a piece of iron, for instance, this magnetic field will become very strong and align the electrons in the iron - thus magnetizing the iron.
464601
Earth revolves around the sun because the giant nebula out of which the solar system formed was spinning and the angular momentum is conserved, and earth spins because of the initial config. Why it revolves in an ellipse, see this\nexplanation at http://www.mathsnet.net/cabri/feynman.html
13196
The strong force holds quarks together in combinations that make protons and neutrons.  It also holds the protons and neutrons together, but in a more subtle way, because protons and neutrons are color neutral.  This means that protons and neutrons don't have excess color charge (which determines the strength of the strong interaction), and by this logic shouldnt be attracted to each other.  The quarks are not in a point-like configuration, though, so each nucleon has a "dipole" and higher order moments. If you've never heard of this kind of thing, it's the same idea as the electric force holding electrically neutral atoms together to make chemical compounds.\n\nThe differences in mass between atoms and the sum of their particles is a consequence of the strong force... the strong force is not caused by the mass difference.  In fact, atoms above iron have a mass which is larger than the sum of their nucleons, while atoms below iron have mass that is smaller than the the sum of their nucleons.  That's why you can only break large atoms for energetic nuclear fission.
106429
b/c the protons in the nucleus would repel protons fired at the atom and the electrons orbiting would repel any electrons fired at it.\njust remember that like charges repel each other.
1127355
The electrons are traveling at such speeds around the nucleus that they are always falling toward the nucleus as they orbit it. Picture the earth travelling around the Sun, to whose gravity it is attracted. It is moving about the Sun at a great enough speed that it doesn't collide with the Sun. But the Sun's gravity is great enough that the Earth doesn't fly off in a straight line.\n\nIf you swing a ball attached to a string around your head, its acceleration is toward the center (your hand) but its velocity is tangental to its orbit.\n\nThe same is true for electrons and protons. Because of the speed of the electrons, they travel in an orbit around the nucleus. But because of the attraction, the electrons don't fly off in a straight line.\n\nAsh's answer below is a little incorrect. The satellite IS attracted to the planet. That's why it doesn't fly off in a straight line. The gravity of the earth attracts the satellite, but the satellites velocity is in a straight line pointing the directio it WANTS to travel if it weren't for the earth's gravitational pull.
838647
It's called "quantum entanglement" in which the quantum states of particles generated from an event are always "connected".  If a reaction produces a particle pair of opposite spins, those particles will always have opposite spins no matter where they are located.  So if you "flip" one, the other must flip instantly.
851812
Protons and neutrons are the nucleus so the electrons orbit in an electron cloud.