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EEJ MAIN Chemistry QUESTION #7202
Question 1
Which of the following alkali or alkaline earth metals can react directly with atmospheric nitrogen ($N_{2}$) to form a nitride?
  • $K$
  • $Li$✔️
  • $Rb$
  • $Cs$
Correct Answer Explanation
  • Among the alkali metals, only Lithium ($Li$) is small enough and has sufficient polarizing power to react directly with $N_{2}$ to form a stable nitride ($Li_{3}N$).
  • This is a characteristic diagonal relationship property between Lithium and Magnesium.