Question

Choose the correct answer.

In a balanced chemical equation,________ are the same.

• A. the numbers of molecules of reactants and products
• B. the number of atoms of each constituents element of reactants and products.
• C. the valences of constituent ions of reactants and products
• D. All the above

Answer 1

The correct option is B

the number of atoms of each constituents element of reactants and products.

Balanced chemical equation - An equation that has the same number of atoms of different elements on the reactants and product side is called a balanced chemical equation.

Example - $\mathrm{Mg}+{\mathrm{O}}_2\to \mathrm{MgO}$ It is an unbalanced chemical equation.

$2\mathrm{Mg}+{\mathrm{O}}_2\to 2\mathrm{MgO}$ It is a balanced chemical equation, here the number of magnesium and oxygen are equal on both sides of the reaction.

Therefore option (b) is correct.