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GK QUESTION#3177

Which of the following statements is NOT correct regarding the alkali metals?

  1. AAlkali metals are generally soft, silvery-white metals.
  2. BTheir first ionisation enthalpies are relatively low and generally decrease down the group.
  3. CThe group 1 metals are known as alkali metals.
  4. DAll the alkali metals have two valence electrons.Correct answer
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Answer

D. All the alkali metals have two valence electrons.

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Explanation

Alkali metals have one valence electron, with an outer ns¹ configuration, not two. Their first ionisation enthalpies are relatively low and generally decrease down the group. Hydrogen occupies group 1 but is not an alkali metal.

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