An electron that has moved from the inner energy levels to the highest occupied energy level of an atom is said to be in an excited state? True or False

What are the theoretical properties of a gas at a temperature of 0 kelvin?

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.