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Which of the following undergoes change during a chemical reaction?

Aatomic mass of elements in reactants
Belement identities of atoms in reactants
Ctotal number of electrons in reactants
Dchemical bonds between atoms in reactants

Verified Answer :

Dchemical bonds between reactants.

In a chemical reaction, the reactants break and establish new bonds between atoms by exchanging electrons. The overall atomic mass doesn't change. Element identities only change with a loss or gain of protons, which happen in nuclear reactions. The total number of electrons does not change, just become exchanged or shared between atoms.

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