Practice Exercise Some instruments differentiate individual quanta of electromagnetic radiation on the basis of their energies. Assume that such an instrument has been adjusted to detect photons that have 5.00 × 10-19 J of energy. What is the wavelength of the detected radiation? Give your answer in nanometers and in meters.

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy, ?kEk , must the electrons have in order to resolve a protein molecule that is 3.70 nm3.70 nm in diameter? Take the mass of an electron to be 9.11×10−31 kg9.11×10−31 kg .

Atomic Ma.. O Register | Pearson . E Bio Sci Peer U ELECTRONIC STRUCTURE AND CHEMICAL BONDING Understanding the meaning of a de Broglie wavelength D 3/5 Imagine an alternate universe where the value of the Planck constant is 6.62607 × 10° J.s. In that universe, which of the following objects would require quantum mechanics to describe, that is, would show both particle and wave properties? Which objects would act like everyday objects, and be adequately described by classical mechanics? object quantum or classical? A mosquito with a mass of 1.8 mg, 9.9 mm long, moving O classical at 2.2 m/s. quantum O classical A car with a mass of 1100. kg, 5.0 m long, moving at 94.0 km/h. O quantum O classical A ball with a mass of 75. g, 13.3 cm wide, moving at 31.8 m/s. O quantur O classical A bacterium with a mass of 10.0 pg, 10.0 pm long, moving at 8.00 um/s. O quantum II

List all possible values of the angular momentum quantum number / for an electron in the M (n=3) shell of an atom. 1 = 0 0.0.... X S