Discussion
The nitrogen atom has 7 protons and 7 electrons. The nitride ion will have
Answer: B
The nitride ion has 7 protons and 10 electrons.
Forming \(\mathrm{N^{3-}}\) means gaining three electrons to reach the neon configuration. The number of protons never changes in ion formation - changing it would change the element - so only the electron count moves, from 7 to 10.
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