We all know that an atom is stable and has electons moving around the nucleous continously.
If the electrons are revolving so they would have an acceleration. So why do electron not fall in the nucleous.
Answers
Answer:
Explanation:
The picture of electrons "orbiting" the nucleus like planets around the sun remains an enduring one, not only in popular images of the atom but also in the minds of many of us who know better. 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) is a nice picture, but is simply untenable.
One origin for this hypothesis that suggests this perspective is plausible is the similarity of the gravity and Coulombic interactions. The expression for the force of gravity between two masses (Newton's Law of gravity) is
Fgravity∝m1m2r2(1)
with
m1 and m2 representing the mass of object 1 and 2, respectively and
r representing the distance between the objects centers
The expression for the Coulomb force between two charged species is
FCoulomb∝q1q2r2(2)
with
q1 and q2 representing the charge of object 1 and 2, respectively and
r representing the distance between the objects centers
However, an electron, unlike a planet or a satellite, is electrically charged, and it has been known since the mid-19th century that an electric charge that undergoes acceleration (changes velocity and direction) will emit electromagnetic radiation, losing energy in the process. A revolving electron would transform the atom into a miniature radio station, the energy output of which would be at the cost of the potential energy of the electron; according to classical mechanics, the electron would simply spiral into the nucleus and the atom would collapse.
Answer:
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Explanation:
Electrons are not little balls that can fall into the nucleus under electrostatic attraction. Rather, electrons are quantized wavefunctions that spread out in space and can sometimes act like particles in limited ways. An electron in an atom spreads out according to its energy.