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1) Which one of the following is an allowed set of quantum numbers? a) n = 1, l = 2, ml = −1 b) n = 2, l = 1, ml = −2 c) n = 0, l = 0, ml = 0 d) n = 1, l = 0, ml = 0 2) How many protons and neutrons are in uranium-235? a) 92 protons, 143 neutrons b) 43 protons, 92 neutrons c) 92 protons, 235 neutrons d) 143 protons, 235 neutrons 3) A laser pulse with a wavelength of 541 nm contains 3.10 mJ of energy. How many photons are in the laser pulse? Express the number of photons to three significant figures. a) NO OPTIONS b) OPEN ENDED 4) Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 103.2 MHz(Megahertz) a) NO OPTIONS b) OPEN ENDED

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