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Quiz_3_sample_test1 - Page 1 of 12 Name Chemistry 1A03/1E03...

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Page 1 of 12 Continued on next page. Name: ____________________ Student number: ______________ Chemistry 1A03/1E03 First Test (Summer) May 19, 2005 Instructor: M. Austen 1. Which one of the following is NOT a consequence of, or evidence for, ‘quantization’? (A) The structure of the periodic table. (B) The frequency and wavelength of light are inversely related. (C) Atoms can only emit and absorb light of particular frequencies. (D) A maximum is observed in the emission spectrum of blackbody radiation. (E) A minimum ‘threshold’ frequency of light is required in order for the photoelectric effect to be observed. 2. The metal filament used in incandescent light bulbs is tungsten (W). The work function ( i.e the binding energy of an electron in the photoelectric effect) of tungsten is 431 kJ/mol. What is the threshold wavelength of tungsten? In other words, what’s the longest wavelength of light that will cause an electron to be ejected from this metal? (A) 7.16 10 –19 nm (B) 278 nm (C) 461 nm (D) 926 nm (E) 3.60 mm
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