* Nitrogen as a Negative Ion (Nitride Ion): When nitrogen bonds with metals that are strongly electropositive (like lithium, sodium, or calcium), it gains three electrons to achieve a stable octet configuration. This results in a nitride ion (N³⁻).
* Nitrogen as a Positive Ion: In certain compounds, nitrogen can lose electrons to form positive ions (cations). This typically occurs when nitrogen is bonded to more electronegative elements, like oxygen or fluorine. For example, in nitric acid (HNO₃), nitrogen has a positive oxidation state.
In summary: Nitrogen's tendency to form positive or negative ions is influenced by its electronegativity and the chemical environment it's in.
