why the electron doesn't fall in nucleus?

Question

Answer

electron does not fall in nucleus because of centripetal force.

Answer

it is because it does not loose or gain energy until it moves from one shell to another hence it constantly moves around nucleus without falling into it

Answer

Why the Electron Doesn't Fall in Nucleus?

Electrons are negatively charged subatomic particles that revolve around the positively charged nucleus of an atom. Since opposite charges attract each other, it is natural to wonder why the electrons don't simply fall into the nucleus and collide with the protons. The answer to this question lies in the fundamental principles of quantum mechanics and the nature of electromagnetic forces.

Electromagnetic Forces

Electromagnetic forces are the fundamental forces that govern the behavior of charged particles. Opposite charges attract each other, while like charges repel each other. The electrons and protons in an atom are held together by electromagnetic forces. However, if the electromagnetic force between the electrons and protons were the only force acting on them, the electrons would indeed fall into the nucleus, and the atom would collapse.

Quantum Mechanics

Quantum mechanics is the branch of physics that deals with the behavior of particles on the atomic and subatomic scale. According to quantum mechanics, the electrons in an atom do not follow a simple circular orbit around the nucleus, as was once believed. Instead, they exist in a cloud of probability surrounding the nucleus, where the probability of finding an electron at a given point is related to the electron's energy level.

Energy Levels

Electrons in atoms exist in discrete energy levels, also known as atomic orbitals. These energy levels are quantized, meaning that an electron can only exist in certain energy states, and not in between. When an electron absorbs energy, it moves to a higher energy level, and when it releases energy, it falls back to a lower energy level. The energy required to move an electron from one energy level to another is known as a quantum of energy.

The Uncertainty Principle

The uncertainty principle is another fundamental principle of quantum mechanics. It states that the position and momentum of a particle cannot be known with absolute precision at the same time. This means that the more precisely we know the position of an electron, the less precisely we can know its momentum, and vice versa.

The Bottom Line

So, why doesn't the electron fall into the nucleus? The answer lies in the combination of the electromagnetic forces holding the electron and proton together and the principles of quantum mechanics. The electrons in an atom exist in a cloud of probability surrounding the nucleus, where their position and momentum cannot be precisely determined. This means that electrons do not follow a simple circular orbit around the nucleus, and they are not in danger of colliding with the protons. Instead, they exist in quantized energy levels, where the probability of finding them at a given point is related to their energy level.

Answer

becoz the presence of centrifugal force

Answer

it's because of centrifugal force l,and guess why electron revolve around nucleus and from where does it get the energy to revolve, as electron looses energy when it dance in a low energy level so when sunlight as a energy falls on the electron it absorb energy andoves to high energy state. I guess you would understand what I said. The proposal, first made in 1913, that the centrifugal force of the revolving electron just exactly balances the attractive force of the nucleus (in analogy with the centrifugal force of the moon in its orbit exactly counteracting the pull of the Earth's gravity).

Answer

because electromagnetic radiations are only applicable for macroscopic body and not for microscopic body and it doesn't radiate energy

Answer

electrons are negatively charged and nucleus is positively chargeelectrons keep on rotatingaround the nucleus in fixed orbit and there is force of repulsion between electron and positively charged nucleus

Answer

electrons constantly revolve around the nucleus and thus centripetal force acts on it which pulls it away from the nucleus ...... thus balances the attraction caused by the nucleus.....hence the electron doesn't falls on the nucleus and prevents it from collapsing.

Answer

electrons are negatively charged and protons are positively charged.so they have electromagnetic force between them which hold them at their positions and hence electrons doesn't fall into the nucleus.

Answer

The Heisenberg's Uncertainty Principle and Special Relativity stops it.

The Uncertainty Principle states that 'More accurately you measure the position of a particle, less accurately you could measure its momentum,'

So if you calculate the position of electron in the K shell, it would come out to be least out of all and its speed will be speed of light. Since nothing can travel faster than the speed of light, electron has reached its minimum radius, or position, in its K shell and doesn't fall into the Nucleus.

Answer

Because of centripetal force

Answer

in this case centrifugal force of electron balances the attractive force bw electron and positive charged nucleus.

Similar JEE Doubts

Using Bohr’s model for H–like atom, match the following. Here n = orbit number, Z = nuclear charge, m = mass of electron Column-I Column-II (

The half-life of 131I is 8 days. Given a sample of 131I at time t = 0, we can assert that

The electron emitted in beta radiation originates from

Top Courses for JEEView all

Physics for JEE Main & Advanced

Mock Tests for JEE Main and Advanced 2025

Mathematics (Maths) for JEE Main & Advanced

Chemistry for JEE Main & Advanced

Study Plan for JEE

Top Courses for JEE

Top Courses for JEE

Related Content

JEE Courses

Mock Test Series

Past Year Papers

Additional Courses

Company