Rank the following in order of stability. I believe that all the hallogens are g

Question

Rank the following in order of stability.

I believe that all the hallogens are going to be the least stable option. What I need help figuring out is why the CO2 and N2 are considered more stable than O2. All of these things are considered other nonmetals... Does one come up with this answer purely based on logic and not some sort of actual equation? I know O2 is great for making things ignite at lower temps, some creatures are poisoned by O2 etc. Is this why it is less stable than the other non metals?

a.) N2

b.) F2

c.) CO2

d.) Br2

E.) O2

Explanation / Answer

The no of bonds between two atoms is a direct indication of its stability. In case of halogen this is a 1, a single bond. In the case of oxygen and CO2 (each CO bond) this is 2 and for N2 this is 3. Again in CO2 there are total 4 bonds to be dissociate to make it unstable and requires high energy compared to two bonds of O2.

Hence the order will be N2,CO2, O2, F2, Br2

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