CEM 141 - Exam 2 (Chapters 2 and 3)
- ANS-Can atoms of a particular element absorb or emit any wavelength of light?
A) Yes
B) No
A) [He] 2s^2 2p^2 - ANS-What is the electron configuration of carbon?
A) [He] 2s^2 2p^2
B) [Ne] 2s^2 2p^2
C) 1s^2 1p^2
D) [He] 2s^2 4p^2
A) 10 core, 4 valence - ANS-How many core and valence electrons does Si have?
A) 10 core, 4 valence
B) 4 core, 10 valence
C) 12 core, 2 valence
Si: [Ne] 3s^2 3p^2
A) 2 core, 5 valence - ANS-How many core and valence electrons does N have?
A) 2 core, 5 valence
B) 5 core, 2 valence
C) 4 core, 3 valence
N: [He] 2s^2 2p^3
A) 2.14 x 10^11 J/mol - ANS-Each deuterium atom is formed 1 proton, 1 neutron, and 1
electron. How much energy is released by the formation of 1 mole of deuterium (D) atoms?
A) 2.14 x 10^11 J/mol
B) 3.56 x 10^-13 J/mol
C) 2.14 x 10^14 J/mol
D) 1.29 x 10^38 J/mol
Useful Info:
E=mc^2
Mass defect: 0.00238 amu
1 amu = 1.6606 x 10^-27 kg
, c = 3.00 x 10^8 m/s
1 J = 1 kg m^2 s^-2
1 mol D = 6.022 x 10^23 D atoms
A) 2.75 x 10^-10 m - ANS-What is the wavelength of an electron moving at 2.65 x 10^6 m s^-1?
A) 2.75 x 10^-10 m
B) 2.75 x 10^-10 J
C) 1.93 x 10^3 m
D) 1.93 x 10^3 J
Useful Info:
-Mass of an electron is 9.1 x 10^-31 kg
- h = 6.626 x 10^-34 J s
- 1 J = 1 kg m^2 s^-2
A) absorb (in order to break LDFs) - ANS-Do phase changes absorb or release energy?
A) Absorb
B) Release
A) Ar - ANS-Which of the following has the smallest atomic radius?
A) Ar
B) Al
C) Ga
D) Kr
A) C-13 - ANS-Which is an isotope of C-12?
A) C-13
B) N-12
C) Mg-12
A) electrostatic - ANS-As 2 nuclei move toward each other ( but are still separated by distances
greater than the size of the nucleus) what force affects them?
A) electrostatic
B) gravity
C) strong nuclear
D) weak nuclear
A) Green - ANS-Which transition is more likely from level 1 to level 3?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Hkane. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.