4B+3O2→A
2B+N2→B
A&B are
BO, BN2
B2O, BN
B2O3, BN
B2O, BN2
Boron reacts with oxygen to form boron trioxide & with nitrogen it forms boron nitride.
4B+3O2→2B2O3
2B+N2→2BN
A&B are as follows