Assertion: Manganese (atomic number 25) has a less favourable electron affinity than its neighbours on either side because Reason: The manganese has stable, [Ar]18 3d5 4s2 electrons configuration

Question

Assertion: Manganese (atomic number 25) has a less favourable electron affinity than its neighbours on either side because Reason: The manganese has stable, [Ar]18 3d5 4s2 electrons configuration (A) If both A and R are correct and R is the correct explanation of A. (B) If both A and R are correct but R is not the correct expalnation of A. (C) A is true but R is false. (D) A is false but R is true.

Tardigrade Admin · Accepted Answer

The magnitude of an element’s electron affinity depends on the element’s valence shell electrons configuration.

_{25} M n = [A r]^{18} 3 d^{5} 4 s^{2}

configuration,

_{24} C r = [A r]^{18} 3 d^{5} 4 s^{1}

configuration,

_{26} F e = [A r]^{18} 3 d^{6} 4 s^{2}

configuration

Q. Assertion: Manganese (atomic number $25$ ) has a less favourable electron affinity than its neighbours on either side because
Reason: The manganese has stable, $[A r]^{18} 3 d^{5} 4 s^{2}$ electrons configuration

If both A and R are correct and R is the correct explanation of A.

If both A and R are correct but R is not the correct expalnation of A.

A is true but R is false.

A is false but R is true.

A and R both are false.

The magnitude of an element’s electron affinity depends on the element’s valence shell electrons configuration.
$_{25} M n = [A r]^{18} 3 d^{5} 4 s^{2}$ configuration, $_{24} C r = [A r]^{18} 3 d^{5} 4 s^{1}$ configuration, $_{26} F e = [A r]^{18} 3 d^{6} 4 s^{2}$ configuration

Q. Assertion: Manganese (atomic number 25) has a less favourable electron affinity than its neighbours on either side because Reason: The manganese has stable, [Ar]183d54s2 electrons configuration