Question

The number of atoms of each element remains the same before and after a chemical reaction.

• A. True
• B. False

Answer 1

The correct option is A True

• During a chemical reaction, only the rearrangement of the atoms occurs.
• The number of atoms of each element in the reactants and products remains the same in a chemical reaction.
• For example $2{\mathrm{H}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to 2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)$ in this reaction, we have 4 hydrogen atoms and 2 oxygen atoms on the reactant side and we have the same number of both atoms on the product side also.

Therefore, the given statement is true.