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NEETChemistrys Block Elements

As you move from lithium (Li) to cesium (Cs) within the alkali metal group, what happens to the atomic size?

Options

  1. AIt decreases
  2. BIt remains constant
  3. CIt increases
  4. DIt fluctuates randomly

Correct answer

C. It increases

Step-by-step solution

The atomic and ionic radii of alkali metals increase on moving down the group, from lithium (Li) to cesium (Cs). This trend occurs because additional energy levels are added with each successive element, leading to larger atomic sizes.

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