Question

why is barium not usually shown in the activity series of metals ?

Answer 1

Here is the answer...

Barium is an active metal. It combines easily with oxygen, the halogens, and other non- metals. The halogens are Group 17 (VIIA) of the periodic table and include fluorine, chlorine, bromine, iodine,and astatine. Barium also reacts with water and with most acids. It is so reactive that it must be stored under kerosene, petroleum, or some other oily liquid to prevent.

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it from reacting with oxygen and moisture in the air. Of the alkaline family, only radium is more reactive.