The inert gases are

Which of the following statements is $NOT$ correct regarding $Helium$?

The noble gas that does not occur in the atmosphere is

Identify the reaction in which oxygen is not one of the products.

The last member of inert gas elements is

Which statements are $NOT$ $TRUE$ about $XeO_{2}F_{2}$?
$A$. It has a see-saw shape.
$B$. $Xe$ has $5$ electron pairs in its valence shell in $XeO_{2}F_{2}$.
$C$. The $O-Xe-O$ bond angle is close to $180^{\circ}$.
$D$. The $F-Xe-F$ bond angle is close to $180^{\circ}$.
$E$. $Xe$ has $16$ valence electrons in $XeO_{2}F_{2}$.
Choose the correct answer from the options given below.