CHEM 210 Final Exam Study Guide

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CHEM 210 Final Exam Study Guide

• What is ground state electron configuration of Co?

[Ar]3d^9 [Ar]4s^1 3d^8 [Ar]4s^2 3d^7

[Ar]4s^2 4p^6 4d^1: [Ar]4s^2 3d^7

• molybdenum has an anomalous electron configuration. using the short-

hand notation for electron configurations, write the electron configuration

• [kr]5s 4d^6
• [kr]5s 4d^0 5p^6
• [kr]5s^1 4d^5

D) [kr]5s^2 4d^4: C) [kr]5s^1 4d^5

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• the symbol [Kr] represents
• 4s^2 4p^6
• 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6
• 1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6

D)1s^2 2s^2 2p^6 3s^6 4s^2 3d^10 4p^6 4d^10: c) 1s^2 2s^2 2p^6 3s^6 4s^2

3d^10 4p^6

• What is the wavelength of UV light in the balmer series when m=2 and n=7?
• 0.00252 nm
• 397 nm

c)337 nm

d)0.00297 nm: b) 397 nm

• How many electrons can a single orbital hold?
• 2n
• 2
• 2l+1

D)8: B) 2

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• What are the possible values of I and m1 for an electron in a 5d orbitial?
• I=0 and mI=0
• I=3 and MI=-2,-1,0,+1, or +2

c) I=1 and MI=-1,0,+1

D) I=2 and MI=-2,-1,0,+1, +2: D) I=2 and MI=-2,-1,0,+1, +2

• What is the the de Broglie wavelength of an electron (m=9.11e-31 kg) moving

at a velocity of 3.0e7m/s?

• 3.9e-12

b)2.4e-11 c)3.3e-8

d)1.1e-4: b)2.4e-11 3 / 4

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• What is the frequency of a helium-neon laser light with a wave of 632.8 nm?
• 4.47e14 s-1

b)4.47e5 s-1 c)2.11e-15 s-1

d)1.58e-15 s-1: a) 4.47e14 s-1

• What is the correct nuclear symbol for the unknown product "X" in the

nuclear equation shown below?A)234 TH 90

B) 226

Ra 88

C) 234

U 90

D) 242

Pu

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