please tell i beg its very important!
when u name nucleus why its start from k,l,m,n,o why not a,b,c,d? please tell
Answers
it is so because at the time when Bohr found the energy levels he wasn't pretty sure if there is no shell closer to the nucleus than the k shell as the atoms were not clearly visible it couldn't be confirmed so he thought to name the first shell , he discovered as k shell so that whenever new shells closer to the nucleus is found it can be named j and so on .
if he would have named it a, b , c , d then if shells closer to nucleus was discovered it would be hard task to name it.
hope you understand
The names of the electron shells come from a fellow named Charles G. Barkla, a spectroscopist who studied the X-rays that are emitted by atoms when they are hit with high energy electrons.
He noticed that atoms appeared to emit two types of X-rays.
The two types of X-rays differed in energy and Barkla originally called the higher energy X-ray type A and the lower energy X-ray type B.
He later renamed these two types K and L since he realized that the highest energy X-rays produced in his experiments might not be the highest energy X-ray possible.
He wanted to make certain that there was room to add more discoveries without ending up with an alphabetical list of X-rays whose energies were mixed up.
As it turns out, the K type X-ray is the highest energy X-ray an atom can emit.
It is produced when an electron in the innermost shell is knocked free and then recaptured.
This innermost shell is now called the K-shell, after the label used for the X-ray.
Barkla won the 1917 Nobel Prize for Physics for this work.
Therefore,
Shells are named after their energy type so it doesn't start in the alphabetical order
I hope this helps you
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