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NEETChemistryd and f Block Elements

How do the atomic radii of the third (5d) series compare to those of the second (4d) series?

Options

  1. AThe atomic radii of the third (5d) series are larger.
  2. BThe atomic radii of the third (5d) series are virtually the same.
  3. CThe atomic radii of the third (5d) series are smaller.
  4. DThe atomic radii of the third (5d) series vary unpredictably.

Correct answer

B. The atomic radii of the third (5d) series are virtually the same.

Step-by-step solution

The radii of the third (5d) series are virtually the same as those of the corresponding members of the second series.

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