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As we know Nitrogen has a combining capacity of 3
Then why does it form 4 bonds with oxygen in this example NO3-
Wait i just realised im not sure I understand your question is the molecule NO3 3- or NO 3-?
I am sorry, that has to be NO3- My bad.
The nitrogen forms 4 bonds with the Oxygens to fullfill the octet necessary for each atom to be stable in this configuration.
if you are wondering how the negative charge comes about i can somewhat explain that
but Nitrogen has a combining capacity of 3 meaning that it cannot have more than 4 bonds?
Ya nitrogen could not have more than 4 bonds. Nitrogen can not expand its octet i believe only elements after Neon can expand there octet.
Or specifically only elements that have a atomic number higher than 10 can expand there octet. If i remember correctly.
So yea Nitrogen is limited to 4 bonds which would have Nitrogen sharing 8 electrons with its surrounding atoms.
No, nitrogen should be limited to 3 bonds, since combining capacity means the maximum number of bonds it can form. Do you mean Nitrogen is an exception?
Ok look at this
Then the Nitrogen completes its octet and each oxygen completes its Octet
I dont really know what this number of bond limits your talking about is. I know what is important and it is that each element has a full 8 valence electrons in the ion.
Yes you are right. Combining capacity is the number of electron an element needs to become stable. It is not related to this topic. I got it. Thanks.