Write the names and symbols of the constituent elements and identify t – InterviewSolution

1.

Write the names and symbols of the constituent elements and identify their valencies from their molecular formulae given below:KCl, HBr, MgBr2 K2O, NaH, CaCl2 , CCl4 , HI, H2S, Na2S, FeS, BaCl2.

Answer»

Molecular formula	Constituent element/Name symbol	Valency
1. KCl	Potassium (K) Chlorine (Cl)	1 1
2. HBr	Hydrogen (H) Bromine (Br)	1 1
3. MgBr₂	Magnesium (Mg) Bromine (Br)	2 1
4. K₂O	Potassium (K) Oxygen (O)	1 2
5. NaH	Sodium (Na) Hydrogen (H)	1 1
6. CaCl₂	Calcium (Ca) Chlorine (Cl)	2 1
7. CCl₄	Carbon (C) Chlorine (Cl)	4 1
8. HI	Hydrogen (H) Iodine (I)	1 1
9. H₂S	Hydrogen (H) Sulphur (S)	1 2
10. Na₂S	Sodium (Na) Sulphur (S)	1 2
11. FeS	Iron (Fe) Sulphur (S)	2 2
12. BaCl₂	Barium (Ba) Chlorine (Cl)	2 1

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