Question

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How many electrons will be present in the sub shell having 's' value of -1/2 for n = 4?
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Answer 1

As there are 4 sub shells, those will be :- s,p,d,f giving a total of = 1+3+5+7= 16 orbitals and 1 electrons for each orbital with ms= -1/2 and +1/2 each.. Thus there will be 16 such electron

Answer 2

Maximum no. of electrons in a sub-shell s is -1/2 where n = 4

Using formula 2n², n = 4

= 2 × 4²

= 2 × 16

= 32

-1/2 × 32 = - 16 = 16 electron

• Electron is one of proton, electron & neutron in an atom .
• It is a quantised particle.
• The electron is always - ve.
• It is in outer orbit.
• It is free moving particle.
• It's value is -1.6 × 10^-19 C.
• Mass of electron = 9.1×10^-31 kg.

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