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Name the Elements Water is Made Of. What Are the Valencies of These Elements ? Work Out the Chemical Formula for Water. - Science

Short Note

Name the elements water is made of. What are the valencies of these elements ? Work out the chemical
formula for water.

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Water (H2O) is made of Hydrogen and Oxygen.

Valency of Hydrogen is 1, and valency of Oxygen is 2.

Valency of one Hydrogen atom = 1

Valency of one Oxygen atom = 2

Therefore, to balance the valency of Oxygen atom, 2 atoms of Hydrogen atoms are required.

Hence, 2 atoms of Hydrogen will combine with 1 atom of Oxygen to form one molecule of water with the chemical formula H2O.

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Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 3 Atoms and Molecules
Short Answers | Q 11 | Page 151
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