Multiple choice

Cesium is the most reactive alkali metal because

  1. its incomplete shell is nearest to the nucleus

  2. it has a single electron in its valence shell

  3. it is the heaviest alkali metal

  4. its outermost electron is more loosely bound than the outermost electron of the other alkali metals
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Because of its large size, the outermost electron of cesium is more loosely bound to the nucleus of the atom. Hence, it can be easily removed.

Keep practicing — related questions