Write all the common oxidation states of halogens.

Give the formula and describe the structure of noble gas species which is isostructural with ${{\mathrm{IBr}}_2}^{-}$.

Give the formula and describe the structure of a noble gas species which is isostructural with:

${\mathrm{BrO}}_3^{-}$

Answer the following with relevant reasons.

The boiling points of noble gases increase with the increase in atomic number.

Answer the following with relevant reasons.

Why helium and neon do not form clathrate compounds with quinol?