Which is most basic in character?

Which of the following metals does not form a metallic nitrate when reacted with concentrated $HNO_3$?

$A$ fire of lithium,sodium,and potassium can be extinguished by

$A$ metal $M$ reacts with $N_2$ to form a compound $A$ $(M_3N)$. Heating $A$ at high temperature gives back $M$,and passing $A$ through $H_2O$ produces gas $B$. Gas $B$ turns $CuSO_4$ solution into a deep blue color. What are $A$ and $B$?

$A$ $\xrightarrow{\Delta } B + C_{(gas)}$ $\xrightarrow{Ca(OH)_2} D_{(milky)} + H_2O$ $\xrightarrow{C_{(gas)}} E$
Then the incorrect statement is:

Provide the names,symbols,and electronic configurations of the elements in the $1^{st}$ group.