CHEM 210 Final Exam Study Guide Well-Structured Study Notes Containing Verified Correct Answers and Clear Topic Explanations (2025–2026 Edition)

CHEM 210 FINAL EXAM STUDY GUIDE WELL-
STRUCTURED STUDY NOTES CONTAINING
VERIFIED CORRECT ANSWERS AND CLEAR
TOPIC EXPLANATIONS (2025–2026 EDITION)




1. 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



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

hand notation for electron configurations, write the electron configuration

A) [kr]5s 4d^6

B) [kr]5s 4d^0 5p^6

C) [kr]5s^1 4d^5

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

,

,3. the symbol [Kr] represents

a) 4s^2 4p^6

b) 1s^2 2s^2 2p^6 3s^6 4s^2 4p^6

c) 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



4. What is the wavelength of UV light in the balmer series when m=2 and n=7?

a) 0.00252 nm

b) 397 nm

c) 337 nm

d) 0.00297 nm: b) 397 nm



5. How many electrons can a single orbital hold?

A) 2n

B) 2

C) 2l+1

D) 8: B) 2






, 6. What are the possible values of I and m1 for an electron in a 5d orbitial?

A) I=0 and mI=0

B) 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



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

at a velocity of 3.0e7m/s?

a) 3.9e-12

b) 2.4e-11

c) 3.3e-8

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