Exam 7: Quantum Theory and Atomic Structure

The ionization energy is the energy needed to remove an electron from an atom. In the Bohr model of the hydrogen atom, this means exciting the electron to the n =  state. What is the ionization energy in kJ/mol, for hydrogen atoms initially in the n = 2 energy level?

Who proposed a model that successfully explained the photoelectric effect?

a. What is the frequency of microwave radiation which has a wavelength of 10.7 cm? b. What is the energy of one photon of this radiation?

Who was the first scientist to propose that the atom had a dense nucleus which occupied only a small fraction of the volume of the atom?

Select the arrangement of electromagnetic radiation which starts with the lowest wavelength and increases greatest wavelength.

For the following orbitals, state the values or n, l and m_l which apply, and draw a sketch showing the shape and orientation of the orbital. a. 3s b. 2p_x

A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?

Interference of light waves

Electromagnetic radiation of 500 nm wavelength lies in the __________ region of the spectrum.

Which scientist first proposed that particles of matter could have wave properties?

According to the Rydberg equation, the line with the shortest wavelength in the emission spectrum of atomic hydrogen is predicted to lie at a wavelength (in nm) of

Line spectra from all regions of the electromagnetic spectrum, including the Paschen series of infrared lines for hydrogen, are used by astronomers to identify elements present in the atmospheres of stars. Calculate the wavelength of the photon emitted when the hydrogen atom undergoes a transition from n = 5 to n = 3. (R = 1.096776 × 10⁷ m^-1)

Which word best describes the phenomenon which gives rise to a rainbow?

a. Calculate the wavelength in nm of a photon whose energy is 6.00 × 10^-19 J. b. Would the photon in (a) have enough energy to ionize a hydrogen atom in its ground state (i.e., to separate the proton and electron completely)? Use the Bohr equation to explain your answer.

As the frequency of electromagnetic radiation increases, its wavelength also increases.

The shape of an atomic orbital is associated with

The de Broglie equation predicts that the wavelength (in m) of a proton moving at 1000. m/s is

For the following equations a. name the scientist to whom the equation is attributed. b. in not more than three lines, explain clearly what the equation means or represents. 1. E = nh 2.  = h/mu 3. H = E 4. xmu  h/4 5. E_photon = h

Which of the following is a correct set of quantum numbers for an electron in a 5f orbital?

The Rydberg equation, giving the wavelengths of lines in the spectrum of the hydrogen atom, was obtained by assuming that energy is quantized.