Give an example(for each phase) of the usefulness of the expansion caused by heating ​

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?