Which Metals are stored in inert gas?

Answer 1

Any of the reactive metals would require some sort of inert storage - that could be an inert gas, paraffin oil, or you could store them in a tube that has been sealed whilst under vacuum.

Of the elements, the most common reactive metals requiring inert gas storage are

Lithium

Sodium

Potassium

Rubidium

Caesium

Calcium

Strontium

Barium

Others include some of the lathanides (such as Europium) and Actinides (such as Uranium) react with air, or the moisture in the air.

The other relatively common example of a metal requiring inert storage is sodium-potassium alloy (commonly know an NaK alloy). This is a very reactive liquid at room temperature and watching two of my colleagues dealing with a NaK fire in a fume cupboard at work was one of the most entertaining afternoons of my career!

Answer 2

Metals such as aluminum, magnesium, and titanium are often stored under inert gases like argon or nitrogen to prevent oxidation or reaction with atmospheric components. This helps maintain the metal's purity and prevents corrosion.