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Quiz1 A07 - 2 Use the attached period table What is the...

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Chemistry 6A Fall 2008 Discussion Section A/E07 QUIZ 1 UCSD PID: |A|__|__|__|__|__|__|__|__| E-mail: [email protected] Printed Last Name: ________________________________ Printed First Name: ________________________________ Signature: ________________________________________ Total Points: _______________ / 20 You have 10 mins to complete this quiz. Please show all your work, but write the answers in the designated spaces. The points allotted for each question are indicated in parenthesis. Potentially Helpful Constants: Mass of electron, m e = 9.10938 x 10 -31 kg Mass of proton, m p = 1.67262 x 10 -27 kg Mass of neutron, m n = 1.67493 x 10 -27 kg Fundamental charge, e = 1.60218 x 10 -19 C g = 9.80665 m s -2 c = 2.99792 x 10 8 m s -1 Potentially Helpful Conversion Factors: 1 J = 1 N•m 1 N = 1 kg m s -2 1 L = 10 3 cm 3 Potentially Helpful Equations: E K = 1/2mv 2 E p = q 1 q 2 4 πε 0 r E p = mgh c = νλ 1. How many significant figures should be results of the following calculation be reported: ___2__ (2pt) (3.5 + 1.2) x 0.42527 x 0.2273 (5.7216 + 3.47)
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Unformatted text preview: 2. Use the attached period table. What is the atomic number of lithium: _3__ What is the mass number of lithium:_6.94___ Name the group to which lithium belong:___alkali_metals__________ For an atom of Li-7, how many neutrons are present:__4__ How many protons are present:__3__ How many electrons are present:__3__ (6pt) 3. What is the amplitude and wavelength of the following wave? If the wave is traveling at 30 m/s, what is its frequency? (7pt) Amplitude:_____6____cm_ __ Wavelength:____10____cm_ __ Frequency :____300_____hz_ __ 4. True false: (5pt) _F__ oxygen is one of the pnictogens. _T__ Infrared radiation has longer wavelength than ultraviolet radiation. _F__ Green light has longer wavelength than red light. _F__ Millikan’s experiment determined the charge to mass ratio of an electron. _T__ In Rutherford’s experiment, alpha particles were deflected by the nuclei of platinum atoms. PERIODIC TABLE OF THE ELEMENTS...
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