com? anges 71/ otor wn t mat 4) 5) 6) 8. 7) 1. 6. 7. 2. 3. 4. 5. Answers: 3) Read Text pages. a) What is the ground state of a hydrogen atom? b) What is an excited state of a hydrogen atom? c) How is a hydrogen atom in the ground state transformed into a hydrogen atom in the excited state? Atomic Structure Exercise A radio station broadcasts at a frequency of 105.4 MHz (FM 105.4). What is the wavelength of this electromagnetic wave? A very bright yellow line in the bright-line spectrum of sodium has a wavelength of 590 nm (nanometers). What is the frequency of this light? How much energy must a mole of hydrogen atoms absorb if the electrons are to increase from the first energy level to the fifth energy level? a) What amount of energy would be released if an electron moves from the second energy level (n=2) to the ground state (n = 1) in a hydrogen atom? b) Calculate the wavelength of electromagnetic radiation which is given off. 10. It takes 519 kJ/mol of energy to cause the ionization of lithium (Li Lit + 1 e). What would be the frequency of light which would cause ionization? What is the energy of a photon given off by one excited hydrogen atom as the electron moves from energy level 3 to energy level 2? Calculate the frequency of the electromagnetic radiation (waves) produced when the electrons in a mole of hydrogen atoms change from the fifth to the second energy level. Calculate the frequency of light emitted if an atom givens off electromagnetic radiation with an energy of 3.21 x 10-22 kJ. 2.85 m 5.08 x 104 cycles/s (Hz) 1260 kJ 3.02 x 10-19 J/atom 6.90 x 104 Hz 8) 9) 4.84 x 104 a) 1.63 x 10-18 J/atom b) 1.22 x 10 m = 122 nm 10) 1.30 x 105