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Chemistry Medium CSS Uploaded: 06 Aug 2026

Which of the following is an alkali metal?

  • A Potassium
  • B Calcium
  • C Magnesium
  • D Aluminum
Correct Answer: Option A — Potassium
Explanation:
Potassium is an alkali metal found in group 1 of the periodic table. Alkali metals are highly reactive, soft, and have a single electron in their outer shell, which they readily lose to form positive ions.
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