Most reactive among the following is:
Correct answer: D. Na
- A. Li
- B. Ca
- C. Mg
- D. Na
Explanation
Among the elements lithium (Li), calcium (Ca), magnesium (Mg), and sodium (Na), sodium (Na) is the most reactive. Reactivity in the alkali metals and alkaline earth metals generally increases as you move down a group on the periodic table. Sodium is in Group 1 (alkali metals), and it is below lithium, which makes it more reactive. Sodium is known for its vigorous reaction with water and air, and it's even more reactive than the other elements listed here.
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