Identify the elements with the following property and arrange them in increasing order of their reactivity

CBSE Class 10 CBSE Class 10 Science
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Identify the elements with the following property and arrange them in increasing order of their reactivity.

  1. An element which is a soft and reactive metal.
  2. The metal which is an important constituent of limestone.
  3. The metal which exists in liquid state at room temperature.

Answer:

  1. Na or K
  2. Ca
  3. Hg

Reactivity order: Hg<Ca<Na<K