I hope i didn t miss any. the triple bonding has to be between atoms that are fully saturated by other carbons ( cuaternar carbons)
The crust is the outside layer and also the thinnest.
The correct answer would be O
2
<span>This means that has great capacity to react with other chemical elements in nature, reacting mainly with sodium, therefore, can only be findings in chemical compounds in most cases.
hope this helps!.</span>