Multiple choice general knowledge science & technology

which of these is the most reactive?

  1. phosphorus

  2. calcium

  3. sodium

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

Sodium is the most reactive element among the options because it's an alkali metal in Group 1 of the periodic table. Alkali metals have a single valence electron that they readily lose to form stable ions, making sodium extremely reactive with water, air, and many other substances. Calcium (alkaline earth metal) is less reactive than sodium, while phosphorus and lead are even less reactive.

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