$Be$ and $Al$ resemble in:

Which of the following is/are amphoteric oxide$(s)$?

Regarding $F^{-}$ and $Cl^{-}$,which of the following statements is/are correct?
$(i)$ $Cl^{-}$ can give up an electron more easily than $F^{-}$
$(ii)$ $Cl^{-}$ is a better reducing agent than $F^{-}$
$(iii)$ $Cl^{-}$ is smaller in size than $F^{-}$
$(iv)$ $F^{-}$ can be oxidized more readily than $Cl^{-}$

In the periodic table,the metallic character of elements

Which group of the periodic table contains only metals?

How many elements in the periodic table are gases? Provide their positions in the periodic table.