Write the rules followed for filling the electrons in various energy shells of any atom, as proposed by Bohr and Bury.??
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Answer:
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Explanation:
The rules followed for filling the various electrons in various energy shells of any atom, as proposed by Bohr and Bury are :
(i) The maximum number of electrons present in a shell is given by the formula 2n2, where ‘ri is the orbit number or energy level index.
(ii) The maximum number of electrons that can be accommodated in the outermost orbit is 8.
(iii) Electrons are not accommodated in a given shell, unless the inner shells are filled. That is, the shells are filled in a stepwise manner.
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Answer:
The distribution of electrons in an atom is called as Electronic Configuration. Formula 2n2 helps in the determination of the maximum number of electrons present in an orbit, here n= orbit number. The formula helps in determination of arrangement of electrons and is known as “Bohr Bury Schemes.”
Electrons are negatively charged subatomic particles arranged like a cloud of negative charges outside the nucleus of an atom. The arrangement depends upon of their potential energies in different orbits. The different energy levels are known as 1, 2, 3, 4….. and the corresponding shells are known as K, L, M, N and so on.
For instance,
1st energy level- K shell/orbit
2nd energy level- L shell/orbit
3rd energy level- M shell/orbit and so on.
Electronic configuration
(Source: schools.aglasem)
Learn about Isobars and Isotopes here.
The Arrangement of Electrons in Different Orbits
The shells begin from the centre and gradually move outwards. So K shell will always have minimum energy. Similarly, L shell is a little away from nucleus so it will have higher energy than K shell. The outermost shell will have maximum energy. Now it is important to understand the distribution and arrangement of electrons in the atoms of any elements in the different energy levels.
An atom of any element is most stable when it has minimum energy. An atom will first fill the lowest energy level so as to attain the state of minimum energy. Gradually, the electrons will fill the higher energy levels. Therefore, electrons will first fill K shell, then L shell, M shell, N shell, and so on.
Electronic configuration
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