Answer
a) sulfide ion (S$^{2-}$)
b) aluminum ion (Al$^{3+}$)
c) nitride ion (N$^{3-}$)
d) calcium ion (Ca$^{2+}$)
Work Step by Step
a) sulfide ion (S$^{2-}$)
b) aluminum ion (Al$^{3+}$)
c) nitride ion (N$^{3-}$)
d) calcium ion (Ca$^{2+}$)
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