Which of the following is an alkali metal?
Answer and explanation
Correct answer: A. Potassium
- Step 1: The alkali metals are in Group 1: lithium, sodium, potassium. Answer: Potassium. Why not the others: Calcium: Calcium is in Group 2. Aluminium: Aluminium is in Group 3. Magnesium: Magnesium is in Group 2.
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