what is the greatest wavelength of incident radiation that will ionize hydrogen atoms in the ground state

Asolution contains 225 g of sodium chloride, nacl, dissolved in enough water to make a 0.25 l of solution. what is the molarity of the solution?

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

Temperature is defined as a. the equivalent of heat. b. a measure of the average kinetic energy of the individual atoms or molecules composing a substance. c. how hot or cold it is. d. the total kinetic energy of the atoms or molecules composing a substance. e. none of the above is correct.