- A photon of which electromagnetic radiation has the most energy?
(1) ultraviolet (2) x ray (3) infrared (4) microwave
- Which unit is equivalent to meters per second?
(1) Hz (s) (2) Hz(m) (3) s/Hz (4) m/Hz
- A particle that is composed of two up quarks and one down quark is a
(1) meson (2) neutron (3) proton (4) positron
- A helium atom consists of two protons, two electrons, and two neutrons. In the helium atom, the strong force is a fundamental interaction between the
(1) electrons, only (2) electrons and protons
(3) neutrons and electrons (4) neutrons and protons
- Which electron transition between the energy levels of hydrogen causes the emission of a photon of visible light?
(1) n =6 to n =5 (2) n = 5 to n = 6 (3) n =5 to n = 2 (4) n =2 to n = 5
- A lithium atom consists of 3 protons, 4 neutrons, and 3 electrons. This atom contains a total of
(1) 9 quarks and 7 leptons (2) 12 quarks and 6 leptons
(3) 14 quarks and 3 leptons (4) 21 quarks and 3 leptons
- A top quark has an approximate charge of
(1) –1.07 x10 -19 C (2) –2.40 x10 -19 C (3) +1.07 x10 -19 C (4) +2.40 x10 -19 C
- An electron in a mercury atom drops from energy level f to energy level c by emitting a photon having an energy of
(1) 8.20 eV (2) 5.52 eV (3) 2.84 eV (4) 2.68 eV
- Moving electrons are found to exhibit properties of
(1) particles, only (2) waves, only
(3) both particles and waves (4) neither particles nor waves
- A photon with a frequency of 5.48 × 1014 hertz is emitted when an electron in a mercury atom falls to a lower energy level.
(A) Identify the color of light associated with this photon. 
(B) Calculate the energy of this photon in joules. [Show all work, including the equation and substitution with units.] 
(C ) Determine the energy of this photon in electronvolts.
- An electron in a mercury atom changes from energy level b to a higher energy level when the atom absorbs a single photon with an energy of 3.06 electronvolts.
(A)Determine the letter that identifies the energy level to which the electron jumped when the mercuryatom absorbed the photon. 
(B) Determine the energy of the photon, in joules. 
(C) Calculate the frequency of the photon. [Show all work, including the equation and substitution with units.] 
(D) Classify the photon as one of the types of electromagnetic radiation listed in the electromagnetic spectrum.