Calculate the ionization energy of helium atom in Joule. b) If light is used to release an electron, calculate its frequency.

Calculate the de Broglie wavelength (in fm) of a 5.8 MeV a particle emitted from an atomic nucleus whose diameter is approximately 1.6 × 10¯14, fm Calculate its minimum kinetic energy (in keV) according to the uncertainty principle. keV Could this particle exist inside the nucleus? Yes No Explain. m.

QUESTION 1 IR radiation can. ionize atoms. cause valence e-1 transitions. induce rotations in molecules. cause inner-shell el transitions.

4. In an electron microscope electrons are accelerated by a 1500-V potential drop to a velocity of approximately 1x108 m/s. a) Calculate the de Broglie wavelength of these electrons. b) What size objects should such a microscope be able to visualize? Explain your answer. c) If you desire a minimum uncertainty in the position of the electrons in your microscope of 1 Å, what is the maximum uncertainty that is acceptable in the momentum and velocity of the electrons?..

9. Considering the photoelectric effect; a) If a material has a cutoff wavelength of 780 nm what is the work function of the material? b) What is the maximum speed of liberated electrons when light with a wavelength of 410 nm is used to illuminate the material? c) If a liberated electron has 3.2349 eV of kinetic energy and it was a photon emitted from a hydrogen atom transition that liberated it, what energy level transition occurred? State both the initial and final energy level.

Which one of the following statements is FALSE?de Broglie's contribution to the Bohr model was that an electron's orbit a)must have a circumference related to the particle's wavelength. b)must have an angular momentum that equals mvr. c)must allow the electron to act as a standing wave. d)can be explained by treating electrons as particle waves.

According to the Bohr model of the atom electrons exist in orbits around the atomic nucleus labelled by a quantum number n. The Bohr radius of an Hydrogen atom is 0.53 angstroms. What is the radius for the n = 3 orbit ? Select one: a. 1.59 angstroms. b. 4.77 angstroms. c. 3.18 angstroms. d. 0.176 angstroms. Clear my choice