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When two electron are placed in two de...

When two electron are placed in two degenerate orbitals of the atom , the energy is lower of their spin is parallel .The statement is based spin

A

Pauli's exclusion

B

Bohr's rule

C

Hund's rule

D

Aufbau principal

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The correct Answer is:
C
Hund's rule
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The statements. (i) In filling a group of orbitals of equal energy, it is energetically preferable to assign electrons to empty orbital rather than pair placed in two different. (ii) When two electrons are placed in two different orbitals, energy is lower of the spins are parallel, are valid for.

In a set of degenerate orbitals, the electrons distribute themselves to retain similar spins as far as possible. This statement is attributed to :

When there are two electron is the same orbitals , they have ……………spins

When there are two el,ectron is the same orbitals , they have ……………spins

The two electrons in the 1s orbital of helium have antiparallel spin. Why do not they have parallel spin ?

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