Question 1 (iii)
Write down the formulae of:
(iii) Sodium sulphide

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Solution

(iii) Sodium sulphide:
Symbol: Na S
$↘ ↙$
Valency: 3 1
Criss crossing the valencies we get the formula as Na₂S.

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Question 1 (iii) Write down the formulae of: (iii) Sodium sulphide

(iii) Sodium sulphide: Symbol: Na S ↘↙ Valency: 3 1 Criss crossing the valencies we get the formula as Na2S.

Question 1 (iii)
Write down the formulae of:
(iii) Sodium sulphide

(iii) Sodium sulphide:
Symbol: Na S
$↘ ↙$
Valency: 3 1
Criss crossing the valencies we get the formula as Na₂S.