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Question

The nitride ion in lithium nitride is composed of :


A
7 protons and 7 electrons
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B
10 protons and 7 electrons
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C
7 protons and 10 electrons
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D
10 protons and 10 electrons
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Solution

The correct option is C 7 protons and 10 electrons
Lithium nitride is $$Li_3N$$ . Here, nitride ion is $$N$$ with $$-3$$ charge. Since atomic no. of nitrogen is 7. 

So, the number of protons is $$7$$ and number of electrons will be  $$7+3=10$$.

Hence, option C is correct.

Chemistry

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