Which of the following is true about the structure of an atom?

a. electrons, neutrons, and protons are made up of even smaller constituents, such as quarks and gluons.

b. an atom is not composed of smaller parts and cannot be broken down into smaller constituents.

c. atoms are composed of tiny cells that make up all forms of matter.

How does a sample of helium at 15 degree celsius compare to a sample of helium at 215 k? a) the helium at 15 degrees celsius has a higher average kinetic energy that the sample at 215 k. b) the helium at 15 degrees celsius has lower nuclear energy that the sample at 215 k. c) the helium at 15 degrees celsius has slower- moving atoms that the sample at 215 k. d) the helium at 15 degrees celsius has smaller atoms than the sample at 215 k.