STATEMENT-1:Electronic configuration of ...

STATEMENT-1`:`Electronic configuration of `Cr^(+3)` ( containing 21 electrons) is same as that of Sc i.e.,isoelectronic species have the same configuration
and
STATEMENT-2 `:` Orbitals of an atom are filled in order increasing energy.

Statement-1 is True, Statement-2 is True, Statement-2 is a correct explanation for Statement-1

Statement-1 is True, Statement-2 isTrue, Statement-2 is NOT a correct explanation for Statement-1

Statement-1 is True, Statement-2 is False

Statement-1 is False , Statement-2 isTrue

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Assertion. Electronic configurations of Cr^(3+) (containing 21 electrons) is same as that of Sc (Z = 21) , i.e., isoelectronic species have the same electronic configuration Reason. Orbitals of atoms as well as ions are filled in order of increasing energy following aufbau principle

If both assertion and reason are true, and reason is the true explanation of the assertion

If both assertion and reason are true, but reason is not the true explanation of the assertion

If assertion is true, but reason is false

If both assertion and reason are false

Lithium and sodium

Sodium and potassium

potassium and calcium

oxygen and chlorine

`Cr^(3+),Fe^(3+)`

`Fe^(3+),Mn^(2+)`

`Fe^(3+),Co^(3+)`

`Se^(3+),Cr^(3+)`