Atoms in covalent bonds do combine so as to be stable. As covalent bond consist non metals e.g O2 in this example each atom has vacance of 2 orbitals/ electrons so shairing electrons result their stability
I believe the correct answer is C, but I'm 100% on this. Hope this helped though!
-TTL
the answer is c, more heat is being released.
The drawing is correct because there are 12 atoms of each type on each side of the arrow.
