The amount of material left after two half-lives is one-half of the original amount.

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That statement is false. When an atom gains or loses electrons, the charged particle that results is called a molecule. The amount of material left after two half-lives is one-half of the original amount. Fission is the combining of two low-mass nuclei into one nucleus with a larger mass. I got that part from google for a more detailed response.

Hope this helps, if not, comment below please!!!

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

i believe the answer is c. "baking" is the gerund, while "baking blueberry muffins" would be the gerund phrase. hope this ! : )