Question

Alkali metals react with sulphur to form .........types of sulphides

Answer 1

They react with sulfur to form sulfides, M2S:

2M(s) + S(g) → M2S(s) M = Li, Na, K, Rb, or Cs

Answer 2

Alkali Metals have valency as : 1+ = \(M^{1+}\)

Sulfide = \(S^{2-}\)

Hence : \( M ^{1+} \quad \qquad \quad S ^ { 2-} \)

\(M_2 S\)