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107 chem Assement Q Student Name : student Number 1. The wavelength of electromagnetic energy multiplied by its frequency equals: a. c, the speed of light b. h, Planck’s constant c. Avogadro’s number d. 4.184 2. The energy of a photon of electromagnetic energy divided by its frequency equals: a. c, the speed of light b. h, Planck’s constant c. Avogadro’s number d. 4.184 3. Light that contains colors of all wavelengths is called: a. b. c. d. a continuous spectrum. monochromatic. a line spectrum. a Balmer series. 4. The lowest energy state of an atom is referred to as its: a. bottom state. b. ground state. c. fundamental state. d. original state. 5. The hydrogen emission spectrum includes light with a wavelength of 434 nanometers. This is caused by an electron moving from: a. the n = 3 state to the n = 2 state. b. the n = 4 state to the n = 2 state. c. the n = 5 state to the n = 2 state. d. the n = 6 state to the n = 2 state. 6. “It is impossible to know both the position and the momentum of an electron simultaneously” is a statement of: a. Hund’s Rule. b. deBroglie’s Hypothesis. c. the Pauli Exclusion Principle. d. the Heisenberg Uncertainty Principle. 7. “No two electrons in the same atom may have the same values for all four quantum numbers” is a statement of: a. Hund’s Rule. b. deBroglie’s Hypothesis. c. the Pauli Exclusion Principle. d. the Heisenberg Uncertainty Principle. 8. All s orbitals are: a. shaped like four-leaf clovers. b. dumbbell-shaped. c. spherical. d. triangular. 9. The way electrons are distributed among the various orbitals of an atom is referred to as the atom’s: a. orbital diagram. b. electron configuration. c. electron distribution. d. electron spread 10. [He]2s22p2 is the electron configuration of which element? a. beryllium b. boron c. carbon a. nitrogen 107 chem Assesment Q-2 Student Name : Student Number : 1. Considering only the n = 1 to n = 5 states in the hydrogen atom, which transition will emit the longest wavelength? n = 5 to n = 4 n = 5 to n = 2 n = 3 to n = 1 n = 3 to n = 2 n = 4 to n = 2 2. What are the valence electrons of vanadium 4s2 3d3 4s23d3 3d5 4d5 3. What are the valence electrons of gallium? 4s2 4p1 4s23d104p1 4s23d10 4s24p1 4. What is the maximum number of orbitals described by the quantum numbers: n=3 l=2 1 3 5 8 9 5. What is the maximum number of electrons described by the quantum numbers: n=4 7 14 16 32 48 6. How many nodal planes does a d orbital have? 0 1 2 3 4 7. How many unpaired electrons does selenium have? 0 2 4 6 8 8. How many unpaired electrons does chromium have? 0 2 4 6 8