Question:
Which of the following elements is classified as an alkali metal?
Which of the following elements is classified as an alkali metal?
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The alkali metals are the elements in Group 1 of the periodic table, which include lithium, sodium, potassium, rubidium, cesium, and francium.
Updated On: Apr 12, 2025
- Sodium (Na)
- Calcium (Ca)
- Magnesium (Mg)
- Aluminum (Al)
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The Correct Option is A
Solution and Explanation
Alkali metals are elements found in Group 1 of the periodic table. These metals are characterized by having one electron in their outermost shell.
- Sodium (Na) is an alkali metal as it is in Group 1 of the periodic table.
- Calcium (Ca) and Magnesium (Mg) are alkaline earth metals, found in Group 2.
- Aluminum (Al) is a post-transition metal and is found in Group 13. Therefore, the correct answer is option (A).
- Sodium (Na) is an alkali metal as it is in Group 1 of the periodic table.
- Calcium (Ca) and Magnesium (Mg) are alkaline earth metals, found in Group 2.
- Aluminum (Al) is a post-transition metal and is found in Group 13. Therefore, the correct answer is option (A).
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