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Metallic radii of some transition elemen...

Metallic radii of some transition elements are given below. Which of these elements will have the highest density -
`{:("Element",Fe,Co,Ni,Cu),("Metallic radii (pm)",126,125,125,128):}`

A

Fe

B

Ni

C

Co

D

Cu

Text Solution

Verified by Experts

The correct Answer is:
D
Density `=("Mass")/("Volume")`. On going from left to right along the series of elements given here, atomic mass increases and ionic radii decreases and hence, volume decreases (with the exception of Cu which has slightly greater atomic radius than Ni). Increase in mass in case of Cu dominates over small increase in volume. So Cu has the highest density.
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Knowledge Check

  • The electronic configuration of some elements are as follow : which element will be most metallic?

    A
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    B
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  • Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest E_(M^(3+)|M^(2+))^(0) value -

    A
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    B
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    C
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    D
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