This printout should have 13 questions. Multiple-choice questions may continue on the next column or page nd all choices before answering. 001 10.0 points A ball has a mass of 0.22 kg just before it strikes the Earth after being dropped from a building 36.7 m tall. What is its de Broglie wavelength? The ac celeration of gravity is 9.8 m/s2 and Planck's constant is 6.62607 x 1034 J - s. Answer in units of m. 002 10.0 points Calculate the de Broglie wavelength for a pro- ton moving with a speed of 6.4 x 106 m/s. The mass of a proton is 1.67262 x 10_27 kg and Planck's constant is 6.62607 x 10_34 J - s. Answer in units of m. 003 10.0 points In the ground state of hydrogen, the uncer- tainty in the position of the electron is roughly 0.16 nm. The mass of ane electron is 9.10939 x 10_31 kg and the Planck's constant is 6.62607 x 10'34 J - s. If the speed of the electron is on the order of the uncertainty in the speed, how fast is the electron moving? Answer in units of m/ s. 004 10.0 points An excited state in a certain atom has an average lifetime of 7.5 x 10_10 s. What is the uncertainty in the energy of that state? [For comparison, atomic states typically have total energies of several eV.] The value of r. is 1.06 x 10*\"4 J - s. AEAt 2 11/2. Answer in units of eV. 005 10.0 points If spin is not included, how many different wave functions correspond to the rst excited level n = 2 for hydrogen? 1. 8 states . 6 states . 5 states . 3 states . 9 states . 7 states . 1 state . 2 states . 10 states . 4 states oemqmmnwm H 006 10.0 points Which of the following imposes the limit on the number of electrons in an energy state of an atom? 1. The Bohr model of the hydrogen atom 2. The Pauli exclusion principle 3. The Heisenberg uncertainty principle 4. The theory of relativity 5. The law of conservation of energy 007 10.0 points If we have a one-electron atom, and the elec- tron can occupy any of 5 different energy lev- els, and transitions are possible between any level and any other, how many lines might ap- pear in that atom's spectrum? [It would help you to draw a sketch.] . ten . seven . six . nine . eight WRMNI-l 008 10.0 points A 26 g ball moves at 20 m/s. If its speed is measured to an accuracy of 0.1%, what is the minimum uncertainty in its position? Answer in units of m. 009 (part 1 of 2) 10.0 points An electron microscope operates with a beam of electrons, each of which has an energy of 65 KeV. Use the uncertainty principle in the form AarAp 2 h to nd the smallest size that such a de- vice could resolve. The value of h is 1.0552 x 1034 J - s. Answer in units of pm. 010 (part 2 of 2) 10.0 points What must the energy of each neutron in a beam of neutrons be in order to resolve the same size of object? Answer in units of eV. 011 10.0 points A HeJr ion corresponds to the principle quan- tum number n = 6. How many states are there? 012 10.0 points The last (most energetic) electron in sodium is in a 33 state. What do you expect the order of the ener- gies to be for the last electrons in the three possible states 3s, 3p, and 3d? 1.3d>3s>3p 2.3p>3s>3d. 3.33:3p=3d 4.3d>3p>3s 5.3s>3p>3d 013 10.0 points Consider the ground state of the silicon atom (Z = 14). What is the electronic conguration for this state? 1. 133 233 3122 3.33 3123 2. 132 232 21:5 333 3p1 3. 132 232 21:5 3.31 3p3 4. 132 232 2125 3.32 3122