Which of the following is not a part of beta decay? O A. The nucleus takes in a beta particle.
O B. An electron is ejected from the nucleus.
O C. The nucleus is unstable.
O D. A neutron turns into a proton.

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.