For the second period elements the correct increasing order of first ionisation enthalpy is:
Li < B < Be < C < O < N < F < Ne
Li < B < Be < C < N < O < F < Ne
Li < Be < B < C < O < N < F < Ne
Li < Be < B < C < N < O < F < Ne
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is :
Mg
Ca
Sr
Be
Which azide is explosive?
Ba(N3)2
NaN3
KN3
Mg3N2
A.
Ba(N3)2
Ionic azides are usually much more stable e.g. KN3, NaN3 and Mg3N2 than the covalent azides. Covalent azides are used as detonators and explosives e.g. Ba(N3)2.