Which of the following undergoes change during a chemical reaction?

a. atomic masses of elements in reactants
b. element identities of atoms in reactants
c. total number of electrons in reactants
d. chemical bonds between atoms in reactants

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explanation:

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water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering. weathering is the breaking down or dissolving of rocks and minerals on earths surface. once a rock has been broken down, a process called erosion transports the bits of rock and minerals away.

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