Question

Which of the following alkali metals is more reactive than K, Na, and Li?

A) Rb
B) Cs
C) Fr
D) Be

Answer 1

Cesium (Cs) is more reactive than K, Na, and Li.

Step-by-step explanation:

The alkali metals, which include lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr), are the most reactive among the metals in the periodic table. They react vigorously with water. Among the given options, cesium (Cs) is more reactive than K, Na, and Li.