Chemistry-
General
Easy

Question

The atomic radius of elements of which of the following series would be nearly the same

  1. (a) N a K R b C s  
  2. L i B e B C  
  3. (c) F e C o N i C u  
  4. F C l B r I  

The correct answer is: (c) F e C o N i C u


    F e comma C o comma N i comma C u. Due to shielding of d-electrons, the effect of increased nuclear charge due to increase in atomic no. neutralised. Consequently atomic radius remains almost unchanged after chromium.

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