Multiple choice general knowledge science & technology

All of the following are alkali metals, except which element?

  1. Sodium

  2. Potassium

  3. Radium

  4. Cesium
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sodium, potassium, and cesium are all alkali metals (Group 1). Radium is an alkaline earth metal (Group 2), not an alkali metal, making it the correct 'except' answer.

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