An element has an atomic number of 29. the number of protons and electrons in a neutral atom of the element are * a. 58 protons and 29 electrons b. 29 protons and 0 electrons c. 15 protons and 14 electrons d. 29 protons and 29 electrons

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.