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NEET2007Chemistrys Block ElementsActual

Largest difference in radii is found in case of the pair

Options

  1. A( Li , Na )
  2. B( Na , K )
  3. C( K , Rb )
  4. D( Rb , Cs ).

Correct answer

B. ( Na , K )

Step-by-step solution

Atomic as well as ionic radii increases from ( Li ) to Fr due to the presence of one extra shell of electron. ( array llllll & Li & Na & K & Rb & Cs Metallic radii (pm) & 152 & 186 & 227 & 248 & 265 array )

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