Exam (elaborations)
Chem 162 Test 1 (1)
- Course
- Institution
Exam of 6 pages for the course CAA201 - Test 3. at CAA201 - Test 3. (Chem 162 Test 1 (1))
[Show more]
Seller
Follow
denicetho
Content preview
Chem 162 Test 1The speed of light - CORRECT ANSWER-3.00e8 m/s
Why is it called black body radiation? - CORRECT ANSWER-Because the
objects studied appear black before heating
What is the difference between an orbit in the Bohr model of the hydrogen atom
and an orbital in the quantum mechanical model? - CORRECT ANSWER-Bohr
proposed that the electron in the hydrogen atom
moves in a well-defined circular path around the nucleus (an orbit). In the
quantum-mechanical model, no effort is made to describe the motion of the
electron. An orbital is a wave function related to the probability of finding the
electron at any point in space.
The longest wavelength is associated with the _______ __________. The lowest
frequency is associated with the ________ _________. - CORRECT
ANSWER-1. lowest frequency
2. lowest energy
Emits or absorbs energy?
1. n=3 --> n=1
2. n=2 --> n=4 - CORRECT ANSWER-1. emits
2. absorbs
What is the designation for the subshell with n=5 and l=1? - CORRECT
ANSWER-5p
How many orbitals are in the p subshell? - CORRECT ANSWER-3 because it
can hold 6 electrons, and there are two electrons for every orbital.
Democritus - CORRECT ANSWER-Greek philosopher that said atoms differed
only in size and shape. Concept of "no cut" atoms was developed
Aristotle - CORRECT ANSWER-Said that all matter was composed of 4
elements: earth, air, water, and fire
, True or False: early indian-chinese scientists are rarely given credit - CORRECT
ANSWER-true!
Problems with alchemy - CORRECT ANSWER-Needed to be a scientific method
where experiments could be repeated by someone else, and results needed to
be reported in clear language that laid out what is known and unknown
Dalton's Atomic Theory proposed that: - CORRECT ANSWER-1. Matter is
composed of indivisible particles (atoms)
2. All atoms of a particular element are identical, and vice versa
3. Different elements have different atoms
4. Atoms combine in certain whole-number ratios
5. In a chemical reaction, atoms are merely rearranged to form new compounds;
they are not created, destroyed, or changed into any other atoms
J. J. Thomson - CORRECT ANSWER--first called electrons "corpuscles"
-developed the plum pudding model which states there is no organization, just a
bunch of electrons
Bohr Atomic Structure - CORRECT ANSWER--Defined orbitals
-Finite number of electrons per orbital
-Electrons are filled from innermost outward: 2, 8, 8, 8, 18 (8, 10), 18, (8,10)
-If electrons move from one orbital to another, energy is absorbed (required) or
given off (visible light)
Quantum model - CORRECT ANSWER--No planetary orbital model- only
statistical probabilities where the electrons are located.
-we know where to find electrons but we don;t know how they got there
Planck - CORRECT ANSWER-Assumed that energy comes in packets called
quanta (quantized energy)
Einstein - CORRECT ANSWER-The photoelectric effect. Energy is proportional
to frequency
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 denicetho. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.65. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
78677 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now