Which of the following occurs when there is a chemical reaction? (Mark all that apply.) a. the reactants don't change
b. bonds between atoms break
c. atoms rearrange
d. new bonds form
e. new substances form
f. there is no product

The correct answer is: Atoms in the reactants are rearranged to form new substances. A chemical reaction has two parts: The reactants and the products. Reactants are used to make products. Atoms are the smallest form of matter and can not be further broken down. They do not change into new atoms but can be rearranged. Thus, in the correct answer, atoms in the reactants, what is listed before a chemical reaction arrow), are simply rearranged in different combinations to form new substances or new products.

Explanation:

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

b. examine and describe cells