if the energy = 4.5 KJ, calculate the wavelength a.) 4.42 x 10 ^ -29 m b.) 4.42 x 10 ^ -39 m c.) 4.42 x 10 ^ -25 m d.) 4.42 x 10 ^ -22 m

14 A photon with a frequency of 5.02 x 10Hz is absorbed by an excited hydrogen atom which causes the electron to be ejected from the atom, forming an ion. Determine the energy of the photon, (Speed of light = 3.0 x 108 m/s, mass of proton = 1.0078250, mass of neutron = 1.008665U, 1U = 931.5- Planck's constant = 6.63 x 10-34 Js, mass of electron = 9.11 x 10-31 kg, Rydberg constant = 1.1 x 107 m. eV = 1.6 × 10-¹9 C). MeV Select one: O O a. 1.2 eV b. 2.1 eV c. 3.2 eV d. 4.1 eV

2. Below are the energies of the first 6 energy levels in Lithium as well as the energies of 6 photons. How many of the photons can be created by an electron that transitions between the any two of the first 6 energy levels in Lithium? En (eV) n 1 2 3 4 5 6 -122.4 -30.6 -13.6 -7.65 -4.896 -3.4 Photon Energies (eV) 108.8 2.754 12.562 27.2 47.29 17.0

Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108 m/s.     a. 1.89/hxc   b. hc/1.89   c. 1.89 x h x c   d. (1.51 + 3.4)/hc   e. hc/3.4

Which of these expressions would yield the wavelength of light in meters emitted when an electron drops from orbit n = 3 to n = 2 in a Bohr hydrogen atom? Given h = 4.14 x 10-15 eVs and c = 3.00 x 108m/s. a. 1.89 x h x c b. hc/3.4 c. (1.51 + 3.4)/hc d. hc/1.89 e. 1.89/hxc

1. What is the wavelength associated with a 250g cricket ball moving at 100 km/h?

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What is the frequency of the emitted photon when an electron in a hydrogen atom jumps from n = 5 to n = 2 state? a) 2.30*106 Hz b) 6.91*1016 Hz c) 6.91*1014 Hz    d) none of these.

5) A metal with work function 9.05 eV is used for a photoelectric effect lab. Find the energy of the electrons if light with 200nm wavelength is used. 6) Energy levels for a particular system is given as En = 10.5 n(n+1)/n^3 in eV. Find the energy for electron transition from n=2 to n=4. Determine if this transition is an absorption that requires energy or it is an emission that releases photon.