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Head Elements (Group 1)

Zn and Cd met...

Question

Zn and Cd metals do not show variable valency because:

A

They have only two electrons in the outermost subshells

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B

Their d-subshells are completely filled

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C

Their d-subshells are partially filled

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D

They are relatively soft metals

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Solution

The correct option is C They have only two electrons in the outermost subshells
we can conclude that zinc and mercury do not show variable valency like d-block elements because their d-shells are complete and They have only two electrons in the outermost subshells

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Similar questions

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

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. The number of elements that do not have completely filled d subshell among the elements

N i, P d, P t, C u, A g, A u, Z n, C d and H g

Q. Which among the following contain partially filled

d

subshell and does not show variable oxidation states?

Q. Assertion (A) : Atoms with completely filled and half-filled subshells are stable.

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

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