Determine the name and symbol of the element with atomic number $118$.

From which of the following are noble gases $NOT$ obtained?

Balance the following equation: $XeF_{6} + H_{2}O \rightarrow XeO_{2}F_{2} + HF$

In the following reaction,find the values of $a, b, p, q, r$ and $s$:
$a XeF_4 + b H_2O \rightarrow p Xe + q XeO_3 + r HF + s O_2$

In a compound formed by $Xe$ and $F$,the mass percentage of $Xe$ $(M=133)$ is $63.8\%$. The oxidation state of $Xe$ in this compound is ..........

The reason for the lowest boiling point of $He$ is...