Question

Write the names and symbols of the constituent element and identify their valencies from the molecular formulae given below

I)KCL. ii) H2S

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Answer 1

Answer:

Solution

Compounds Name of compounds Valency of constituent elements

KCl Potassium chloride K = 1, Cl = 1

HBr Hydrogen bromide K = 1, Br = 1

MgBr2 Magnesium bromide Mg = 2, Br = 1

K2O Potassium oxide K = 1, O = 2

Explanation:

H2S   Hydrogen sulphide    H,S    H=1,S=2

Answer 2

Answer:

● KCI = potassium chloride

● H2S = Hydrogen sulphide