Question

The most chemically reactive metal. Though it is quite rare, it is used in some photoelectric cells and in atomic clocks, which have far greater accuracy than mechanical or electric clocks.

Options:
A) Sodium
B) Potassium
C) Cesium
D) Rubidium

Answer 1

Cesium is the most chemically reactive metal among the options provided. It is used in photoelectric cells and atomic clocks for their greater accuracy.

Step-by-step explanation:

The most chemically reactive metal among the options given is cesium (C). Cesium is part of Group 1 in the periodic table, also known as the alkali metals. Alkali metals are highly reactive and react vigorously with water.

Cesium, although quite rare, is used in some photoelectric cells and in atomic clocks. Atomic clocks are known for their far greater accuracy than mechanical or electric clocks. Overall, cesium is the most chemically reactive metal and is used in specialized applications because of its unique properties.