The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter noble gases are due to the weak dispersion forces between the atoms and the absence of other interatomic interactions, The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers +2, 4 and +6, `XeF_4` reacts violently with water to give `XeO_3`. The compouds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.
Argon is used in arc welding because of its

Options

A. low reactivity with metals
B. ability to lower the melting point of metals
C. flammability
D. high calorific value

Answer

A

Explanation

Argon is used in arc welding because of its low reactivity with metals. It causes an inert atmosphere without interaction with the metal.