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Metallic radii of some transitions eleme...

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

A

Fe

B

Ni

C

Co

D

Cu

Text Solution

Verified by Experts

The correct Answer is:
d
Density `=` Mass `// ` volume . As we move from Fe to Cu, mass increases and volume decreases. Hence, density increases `[Fe(7.87) , Co( 8.90) , Ni( 8.91) , Cu( 8.95)]`. Increases in mass in case of Cu dominates over small increase involume.
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PRADEEP-D- AND F-BLOCK ELEMENTS-NCERT EXEMPLAR PROBLEMS(MULTIPLE CHOICE QUESTIONS)
  1. Electronic confriguration of a transition element X in +3 oxidation st...

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  2. The electronic configurationo of Cu(II) is 3d^(9) whereas that of Cu(I...

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  3. Metallic radii of some transitions element are given below. Which of t...

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  4. Generally transition elements from coloured salts due to the presence ...

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  5. On addition of small amoung of KMnO(4) to concentrated H(2)SO(4), a gr...

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  6. The magnetic nature of elements depends on the presence of unpaired el...

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  7. Which of the following oxidation state si common for all lanthanoids?

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  8. Which of the following reactions are disproportionation reaction ?

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  9. When KMnO(4) solution is added to oxalic acid solution , the decolouri...

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  10. There are 14 elements in actinoid series. Which of the following eleme...

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  11. KMnO(4) acts as an oxidising agent in acidic medium. The number of mol...

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  12. Which of the following is amphoteric oxide? Mn(2)O(7),CrO(3),Cr(2)O(...

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  13. Gadolinium belongsd to 4f series. It's atomic number is 64. which of t...

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  14. Interstitial compounds are formed when small atoms are dropped under t...

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  15. The magnetic moment is associated with its spin angular momentum and o...

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  16. KMnO(4) acts as on oxidising agent in alkaline medium. When alkaline K...

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  17. Which of the following statements is not correct ?

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  18. When acidified K(2)Cr(2)O(7) solution is added to Sn^(2+) salts then S...

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  19. Higher oxidation state of manganese in fluoride is +4 (MnF(4)) but hig...

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  20. Although zirconium belongs to 4d transition series and hafnium to 5d t...

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