What is the number of shared electrons

Subtract Shared from Valence. For each atom, subtract shared electrons from number of valence electrons. Oxygen (O) has eight valence electrons. The left oxygen in O-N=O has 8 – 2 = 6 unshared electrons

8

Its correct

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.