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Quantum Numbers

Zn and Cd do ...

Question

Zn and Cd do not show variable valency because:

A

they are soft

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B

their d subshells are complete

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C

they have only two electrons in outer most subshells

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D

their d subshells are incomplete

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Solution

The correct option is B their d subshells are complete
D-block elements show variable valency due to their incomplete d-orbitals but as d-orbitals of Zn and Cd are fully filled so they do not show variable valency.

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Similar questions

Q. Zn and Cd metals do not show variable valency because:

Q. Which of the following statements are correct about

Z n, C d

H g

?

(I)

they exhibit high enthalpies of atomisation as the

d

-subshell is full

(I I)

Z n

C d

do not show variable oxidation states while

H g

+ I

+ I I

(I I I)

Z n, C d

H g

are paramagnetic in nature

(I V)

Z n, C d

H g

are called soft metals.

Q. Sort the following subshells in the order in which they are filled with electrons.

Q. Assertion :Transition metals show variable valency. Reason: Transition metal ions possess unpaired electrons in 'd' subshell.

Q. Assertion:
Atoms with completely filled and half filled subshells are stable.

Reason:
Completely filled and half-filled subshells have the symmetrical distribution of electrons and have maximum exchange energy.

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