Question

why electron does not attract to nucleus & why it revolveing.

Answer 1

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.

Moreover, The speed of electrons is what keeps them in there respective orbitals. its kinda like why the speed of our earth keeps us from going into the sun.

Answer 2

shivam is absolutely right about this

Answer 3

but which force keep distance between electron & nucleus.

Answer 4

Centripetal acceleration :)

Answer 5

centripetal force

Answer 6

which results in centripetal acceleration
as shivam told

Answer 7

there is no acceleration since velocity of electron is constant

Answer 8

Please google for centrpetal acceleration .

Answer 9

no atul rock direction of velocity is constantly changing as it is moving in circle which has direction tangent to the any point at circle

Answer 10

Yes @ WAHEEDAHMED is right. I suggest you have a read at centripetal acceleration in detail @ATULrock

Answer 11

how centripetal force is produced in this case

Answer 12

See, the force of attraction between oppositely charged nucleus and electron is responsible for centripetal force in this case

Answer 13

since oppositely charged attract each other then why they produced centripetal force

Answer 14

opposite charges attract eachother atul.where as like charges repel

Answer 15

sorry but ,i believe, what all you ppl are saying is completely false...it is the uncertainity that keeps electron from falling in nucleus..

Answer 16

@quarkine Uncertainity is an event. The uncertainity is caused due to very small size and very high velocity of nucleus. So indirectly,@quarkine , you are saying the same thing as us :)

Answer 17

i m saying that if electron will fall in nucleus then it would violate uncertainity principle..

Answer 18

@quarkine , would you exactly explain how??

Answer 19

I am sorry, I wrote "...high velocity of nucleus....". It should be "...high velocity of electron.."

Answer 20

nucleus is very heavy...if electron will stick to it then its velocity will reduce,perhaps become zero and its position will be known very well and the principle will be violated...so it must 'move'..

Answer 21

@quarkine , the uncertainity principle applies for electron because it is travelling at very high speed. If the electron speed comes to 0, then the uncertainity principle doesnot apply. It in any circumstance doesnot violate uncertainity priinciple even if velocity of electron is 0

Answer 22

In other words, you are certain about the electron's position. If you are certain about the electron's position, it doesnot imply that it violates the uncertainity principle

Answer 23

Read more about uncertainity principle for clear understanding

--> http://www.halexandria.org/dward159.htm

Answer 24

velocity of electron is certain to be zero and we certainly know th position of nucleus dont we...so how is the violation avoided?

Answer 25

I am asking , how is it violating the law??

Answer 26

put the uncertainity of electrons position and vel to be zero in uncertainity principle equation...

Answer 27

Yes we get uncertainity in positon = 0

Answer 28

So how does it violate the law???

Answer 29

In other words, we are absolutely sure of electron's postition

Answer 30

I am sorry,
uncertainity principle would give us the error involved in estimating the poition of electron.
In this case , the electron is staitionary and so we are 99% sure of its position and error in measurement would be neglible.

Answer 31

hey quarkine if electrons velocity becomes 0 it will fall in the nucleus because centripetal force will overcome the centrifugal force which is there because motion of the electron which is equal to the kinetic energy of electron if velocity becomes 0 so will be the centrifugal force which is counteracting the centripetal force in the atom due to which electron is moving in orbit.if we suppose that velocity is 0 than electron will fall into nucleus and hence will destroy stability of nucleus and the nucleus itself ....hence u are wrong quarkine.......we just suppose the electron to be halt when we want its position which infact is not zero its just our supposition to get specific position of the electron in its orbit

Answer 32

@WAHEEDAHMED, you are absolutely right :)

Answer 33

u ppl are ignoring the wave nature of electron...if the uncertainity in vel=0..then uncertainity in position will become infinitely high...so it wont be just lying in thhe nucleus ..in fact to make uncertainity more than or equal to h/4pi,it will be delocalised and we cant even tell if the electron is even in the initial galaxy or not!!!

Answer 34

Please re read the Heisenberg's uncertainity formula. If you know the formula, then post it here and give what each quantity stands for.

Answer 35

put delta p=0 and you will see that delta x must be infinite