Week 2 Homework Problems  [ENDORSED]

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DesireBrown3K
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Week 2 Homework Problems

Postby DesireBrown3K » Sat Oct 05, 2019 12:05 pm

For the week 2 homework, should we only be doing the problems from the Quantum World section? I just wanted to make sure before getting started on it. 

KHowe_1B
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Re: Week 2 Homework Problems

Postby KHowe_1B » Sat Oct 05, 2019 2:13 pm

He didn't specify but that is what we covered in the last 2 lectures so I have been doing problems from the Quantum World homework.

EDIT:
An email was just sent out and it stated:
"Since students want to focus on the high school review topics for test 1 they can hand in homework #2 covering review topics and/or quantum. HW #3 (Week 3) will be only quantum topics."

So this week it's either but next week it is quantum.

Chem_Mod
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Re: Week 2 Homework Problems  [ENDORSED]

Postby Chem_Mod » Sat Oct 05, 2019 2:21 pm

I sent email to the class:

"As stated in the Syllabus, students submit homework on recently covered material.
Since students want to focus on the high school review topics for test 1 they can hand in homework #2 covering review topics and/or quantum.

HW #3 (Week 3) will be only quantum topics."

Ayushi2011
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Re: Week 2 Homework Problems

Postby Ayushi2011 » Sat Oct 05, 2019 3:50 pm

He specified to do either fundamentals or quantum world or both for Homework 2!

Ayushi2011
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Re: Week 2 Homework Problems

Postby Ayushi2011 » Sat Oct 05, 2019 3:52 pm

He specified to do either fundamentals or quantum world or both for Homework 2!

Rosa Munoz 4D
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Re: Week 2 Homework Problems

Postby Rosa Munoz 4D » Sat Oct 05, 2019 9:26 pm

He sent out an email earlier today. You can do problems from last week's section or the quantum one.

HanaAwad_4B
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Re: Week 2 Homework Problems

Postby HanaAwad_4B » Sat Oct 05, 2019 9:56 pm

You can do whatever is relevant to the class. Because we have a test on Tuesday over general chem, we can still submit homework in the fundamentals section.

GEOVANNAO_3F
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Re: Week 2 Homework Problems

Postby GEOVANNAO_3F » Sat Oct 05, 2019 11:13 pm

Thanks! I was sort of confused, so we’re allowed to solve problems from both fundamentals and quantum list.

GEOVANNAO_3F
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Re: Week 2 Homework Problems

Postby GEOVANNAO_3F » Sat Oct 05, 2019 11:15 pm

Thanks! I was sort of confused, so we’re allowed to solve problems from both fundamentals and quantum list.

AnayaArnold_3L
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Re: Week 2 Homework Problems

Postby AnayaArnold_3L » Sun Oct 06, 2019 5:59 pm

GEOVANNAO wrote:Thanks! I was sort of confused, so we’re allowed to solve problems from both fundamentals and quantum list.


Hey, we are allowed to solve problems for both or just one or the other it all depends on if you feel as though you need more practice with the high school review module for the test next week during the discussion sections.

Lauren Sanchez 3D
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Re: Week 2 Homework Problems

Postby Lauren Sanchez 3D » Sun Oct 06, 2019 10:47 pm

Just to make sure, the homework problems are now due during our actual discussions right?

Jaklin Astvatsatryan
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Re: Week 2 Homework Problems

Postby Jaklin Astvatsatryan » Sun Oct 06, 2019 10:55 pm

Lauren Sanchez 3D wrote:Just to make sure, the homework problems are now due during our actual discussions right?


Yes. Our TA's will be collecting them the day of your discussion.

Abraham De Luna
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Re: Week 2 Homework Problems

Postby Abraham De Luna » Sun Oct 06, 2019 11:13 pm

He specified to do either fundamentals or quantum world for homework 2.

Jaklin Astvatsatryan
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Joined: Wed Sep 18, 2019 12:18 am

Re: Week 2 Homework Problems

Postby Jaklin Astvatsatryan » Sun Oct 06, 2019 11:17 pm

This isn't a homework problem but under Fundamental E exercises, is the problem, "The approximate population of Earth is 7.0 billion people. How many moles of people inhabit Earth? (b) If all people were pea pickers, how long would it take for the entire population of Earth to pick 1 mol of peas at the rate of one pea per second, working 24 hours per day, 365 days per year?" I was wondering how you solve part b.

KTran 1I
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Re: Week 2 Homework Problems

Postby KTran 1I » Sun Oct 06, 2019 11:58 pm

Abraham De Luna wrote:He specified to do either fundamentals or quantum world for homework 2.

Would there be any benefit to do one or the other, such as if one would better prepare us for a test or quiz?

KatherineValdez_4B
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Re: Week 2 Homework Problems

Postby KatherineValdez_4B » Mon Oct 07, 2019 12:00 am

So just to be sure we can choose from the new material and the hs practice correct?

805097738
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Re: Week 2 Homework Problems

Postby 805097738 » Mon Oct 07, 2019 7:35 am

I'm doing a mix of fundamental questions and quantum questions. You can decide if you need more practice for the review of fundamentals test or if you are ready to move on to quantum problems!

Jillian C 4C
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Re: Week 2 Homework Problems

Postby Jillian C 4C » Mon Oct 07, 2019 5:13 pm

There was an email sent out that said homework for Week 2 can cover both review topics and the quantum world. I would prefer to focus more on the review topics as there is a test coming up during discussions.

Maya Pakulski 3D
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Re: Week 2 Homework Problems

Postby Maya Pakulski 3D » Tue Oct 08, 2019 11:49 am

Jaklin Astvatsatryan 3G wrote:
Lauren Sanchez 3D wrote:Just to make sure, the homework problems are now due during our actual discussions right?


Yes. Our TA's will be collecting them the day of your discussion.


Our answers on chemistry community will always be due Sunday night though right?

selatran1h
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Re: Week 2 Homework Problems

Postby selatran1h » Tue Oct 08, 2019 3:34 pm

We are allowed to do our homework either on quantum or on the review sections as long as it is five problems total.

McKenna_4A
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Re: Week 2 Homework Problems

Postby McKenna_4A » Tue Oct 08, 2019 11:15 pm

Do problems relevant to you at the time. Although we are currently studying quantum, doing problems from the fundamentals unit may help you study for the test. Definitely try and mix it up a bit though.

Leila_4E
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Re: Week 2 Homework Problems

Postby Leila_4E » Tue Oct 08, 2019 11:23 pm

Are the TA discussions going to start to do homework problems in class?

Emma Popescu 3D
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Re: Week 2 Homework Problems

Postby Emma Popescu 3D » Wed Oct 09, 2019 10:59 am

Maya Pakulski 3D wrote:
Jaklin Astvatsatryan 3G wrote:
Lauren Sanchez 3D wrote:Just to make sure, the homework problems are now due during our actual discussions right?


Yes. Our TA's will be collecting them the day of your discussion.


Our answers on chemistry community will always be due Sunday night though right?


yes, the 5 posts on chemistry community are due Sunday

Diana Chavez-Carrillo 3J
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Re: Week 2 Homework Problems

Postby Diana Chavez-Carrillo 3J » Wed Oct 09, 2019 1:10 pm

Are the TA's grading our homework based on completion or correctness?

Ayushi2011
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Joined: Wed Feb 27, 2019 12:17 am

Re: Week 2 Homework Problems

Postby Ayushi2011 » Wed Oct 09, 2019 6:18 pm

You can do either! I did both just to review all topics.

aphung1G
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Re: Week 2 Homework Problems

Postby aphung1G » Wed Oct 09, 2019 6:40 pm

Can someone clarify the answer?

Which of the following statements about the electromagnetic spectrum is true? Explain your reasoning.
(a) X-rays travel faster than infrared radiation because they have
higher energy.
(b) The wavelength of visible radiation decreases as its color
changes from blue to green.
(c) The frequency of infrared radiation, which has a wavelength
of 1.0 3 10 3
nm, is half that of radio waves, which have a wavelength of 1.0 3 10 6
nm.

aphung1G
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Re: Week 2 Homework Problems

Postby aphung1G » Wed Oct 09, 2019 6:46 pm

What equation should be utilized for this problem?


1A.15 In the ultraviolet spectrum of atomic hydrogen, a line is
observed at 102.6 nm. Determine the values of n for the initial and
final energy levels of the electron during the emission of energy
that leads to this spectral line.

aphung1G
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Re: Week 2 Homework Problems

Postby aphung1G » Wed Oct 09, 2019 6:48 pm

What conversion would we use to turn the value into picometers?

1A.7 (a) The frequency of violet light is 7.1 3 10 14 Hz. What is
the wavelength (in nanometers) of violet light? (b) When an electron beam strikes a block of copper, x-rays with a frequency of
2.0 3 10 18 Hz are emitted. What is the wavelength (in picometers)
of these x-rays?

aphung1G
Posts: 33
Joined: Sat Aug 24, 2019 12:15 am

Re: Week 2 Homework Problems

Postby aphung1G » Wed Oct 09, 2019 6:51 pm

Does anyone know the energy of microwaves?

Arrange the following types of photons of electromagnetic
radiation in order of increasing energy: g -rays, visible light, ultraviolet radiation, microwaves, x-rays.

aphung1G
Posts: 33
Joined: Sat Aug 24, 2019 12:15 am

Re: Week 2 Homework Problems

Postby aphung1G » Wed Oct 09, 2019 6:55 pm

1A.9 A college student recently had a busy day. Each of the student’s activities on that day (reading, getting a dental x-ray, making popcorn in a microwave oven, and acquiring a suntan)
involved radiation from a different part of the electromagnetic
spectrum. Complete the following table and match each type of
radiation to the appropriate event

Emily_4B
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Re: Week 2 Homework Problems

Postby Emily_4B » Wed Oct 09, 2019 8:55 pm

aphung1G wrote:Does anyone know the energy of microwaves?

Arrange the following types of photons of electromagnetic
radiation in order of increasing energy: g -rays, visible light, ultraviolet radiation, microwaves, x-rays.


Microwaves fall between radio waves and infrared, so from lowest to highest energy it would be: microwave, visible light, ultraviolet radiation, x-ray, gamma ray

thanh24mai
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Re: Week 2 Homework Problems

Postby thanh24mai » Wed Oct 09, 2019 11:14 pm

You can do problems from both the fundamentals or quantum section!

Angela Prince 3B
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Re: Week 2 Homework Problems

Postby Angela Prince 3B » Thu Oct 10, 2019 12:16 am

Does anyone know if we will be on the quantum topic for more than just one week? I just want to know if the homework set for quantum will be used for both weeks 3 and 4. Thanks!

Jamie Hwang 3H
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Re: Week 2 Homework Problems

Postby Jamie Hwang 3H » Thu Oct 10, 2019 12:22 am

I think Professor Lavelle mentioned that Quantum Mechanics will be covered in the next couple of weeks. At least I hope so because I've only been working on Fundamentals this week.

Maya Beal Dis 1E
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Re: Week 2 Homework Problems

Postby Maya Beal Dis 1E » Thu Oct 10, 2019 8:21 am

Since the Quantum Unit is more than a week long does it mean we just hand in five homework problems from that section every week until we are done with the unit?

Maya Beal Dis 1E
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Re: Week 2 Homework Problems

Postby Maya Beal Dis 1E » Thu Oct 10, 2019 8:23 am

Does it matter which subsection the homework problems we are doing are from as long as they are within the quantum mechanics section (like 1A v. 1B v. 1D etc.)?

RichBollini3C
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Re: Week 2 Homework Problems

Postby RichBollini3C » Thu Oct 10, 2019 8:16 pm

ktran Disc 1I wrote:
Abraham De Luna wrote:He specified to do either fundamentals or quantum world for homework 2.

Would there be any benefit to do one or the other, such as if one would better prepare us for a test or quiz?

Doing the fundamentals problems for homework 2 would probably be the best preparation for the test since quantum is not on it.

RichBollini3C
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Joined: Wed Sep 18, 2019 12:18 am

Re: Week 2 Homework Problems

Postby RichBollini3C » Thu Oct 10, 2019 8:18 pm

Maya Beal Dis 1E wrote:Since the Quantum Unit is more than a week long does it mean we just hand in five homework problems from that section every week until we are done with the unit?

I also was confused about this, will he tell us what sections we should be doing each week?

RichBollini3C
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Re: Week 2 Homework Problems

Postby RichBollini3C » Thu Oct 10, 2019 8:20 pm

Angela Prince 3B wrote:Does anyone know if we will be on the quantum topic for more than just one week? I just want to know if the homework set for quantum will be used for both weeks 3 and 4. Thanks!

I think since we are learning about quantum topics for a couple of weeks it should be used for both week 3 and 4.

RichBollini3C
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Re: Week 2 Homework Problems

Postby RichBollini3C » Thu Oct 10, 2019 8:21 pm

Diana Chavez-Carrillo 3J wrote:Are the TA's grading our homework based on completion or correctness?

I believe they are grading based on correctness.

Cassandra_1K
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Re: Week 2 Homework Problems

Postby Cassandra_1K » Thu Oct 10, 2019 9:24 pm

For homework assignment week 3 would we be able to do week 2 homework problems as well or is it just going to be week 3 homework problems?

Angela Prince 3B
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Re: Week 2 Homework Problems

Postby Angela Prince 3B » Thu Oct 10, 2019 11:26 pm

Cassandra_1K wrote:For homework assignment week 3 would we be able to do week 2 homework problems as well or is it just going to be week 3 homework problems?


Week 3 homework is only on Quantum Mechanics; the only reason Prof Lavelle allowed us to use the fundamentals for week 2 homework is because he was giving us the option to gain more practice on fundamentals before the test.

sbottomley3a
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Re: Week 2 Homework Problems

Postby sbottomley3a » Fri Oct 11, 2019 10:31 am

For week 3 we should only be submitting problems from the quantum section. We were allowed to submit fundamentals problems for week 2 because so many students were still preparing for the test, and he didn't want us to have to confuse ourselves with new material before it.

nicole-4d
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Re: Week 2 Homework Problems

Postby nicole-4d » Fri Oct 11, 2019 10:57 am

sbottomley3a wrote:For week 3 we should only be submitting problems from the quantum section. We were allowed to submit fundamentals problems for week 2 because so many students were still preparing for the test, and he didn't want us to have to confuse ourselves with new material before it.

Yes you should be doing the quantum section now. He said you should be doing homework from what was taught in the lectures for that week.

AGulati_4A
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Re: Week 2 Homework Problems

Postby AGulati_4A » Fri Oct 11, 2019 10:58 am

He said you can do the Quantum world problems or even the problems from the fundamentals for practice

erica thompson 4I
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Re: Week 2 Homework Problems

Postby erica thompson 4I » Fri Oct 11, 2019 1:40 pm

You can do problems from the Review sections, as that is the majority of the content for this week's Test.

melinak1
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Re: Week 2 Homework Problems

Postby melinak1 » Fri Oct 11, 2019 4:25 pm

the homework due for this coming week is over quantum only, due during your discussion section

SMIYAZAKI_1G
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Re: Week 2 Homework Problems

Postby SMIYAZAKI_1G » Fri Oct 11, 2019 11:25 pm

He pretty much said that we were allowed to do both fundamental principles or quantum world problems. Probably fundamentals just because we just had a test and he wanted us to practice and he also wants us to try new set. of problems.

MaggieHan3D
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Re: Week 2 Homework Problems

Postby MaggieHan3D » Sat Oct 12, 2019 12:58 pm

For week 3, we definitely have to do quantum.

Merin Padayatty 3G
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Re: Week 2 Homework Problems

Postby Merin Padayatty 3G » Sat Oct 12, 2019 7:43 pm

I think we're only supposed to turn in problems from the quantum section this week.

Celena Kim 3I
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Joined: Sat Sep 14, 2019 12:17 am

Re: Week 2 Homework Problems

Postby Celena Kim 3I » Sat Oct 12, 2019 8:28 pm

Week 2 HW could have been either review problems or quantum problems, but week 3 is definitely only quantum problems.

Annie Chantasirivisal_4I
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Joined: Wed Sep 18, 2019 12:21 am

Re: Week 2 Homework Problems

Postby Annie Chantasirivisal_4I » Sat Oct 12, 2019 8:40 pm

aphung1G wrote:What conversion would we use to turn the value into picometers?

1A.7 (a) The frequency of violet light is 7.1 3 10 14 Hz. What is
the wavelength (in nanometers) of violet light? (b) When an electron beam strikes a block of copper, x-rays with a frequency of
2.0 3 10 18 Hz are emitted. What is the wavelength (in picometers)
of these x-rays?


A picometer is 1x10^-12 meters so after you divide the constant (2.998x10^8) by the x-ray's frequency, you divide your answer (which is in meters) by 1x10^-12 to get your answer in picometers.

Madeline Phan 4H
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Re: Week 2 Homework Problems

Postby Madeline Phan 4H » Sun Oct 13, 2019 8:52 am

For Week 2, I did problems on Fundamentals as a practice for Test 1. But for Week 3, we definitely have to do problems from the Quantum World.

Claire Grover 3G
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Re: Week 2 Homework Problems

Postby Claire Grover 3G » Sun Oct 13, 2019 12:41 pm

I believe we only have to do Quantum World problems this upcoming week (Week 3).

405398682
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Joined: Wed Sep 18, 2019 12:21 am

Re: Week 2 Homework Problems

Postby 405398682 » Sun Oct 13, 2019 4:07 pm

We can do both of them or just choose one unit to work on.

Keerthana Sivathasan 4G
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Joined: Wed Sep 18, 2019 12:22 am

Re: Week 2 Homework Problems

Postby Keerthana Sivathasan 4G » Sun Oct 13, 2019 4:07 pm

Week 2 homework could be quantum and fundamentals solely because we also had Test 1 that week, and Lavelle said doing fundamentals problems for our homework would help us for the test, but because we learned some quantum in class, it was okay to do those problems as well.

MBouwman_4A
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Re: Week 2 Homework Problems

Postby MBouwman_4A » Sun Oct 13, 2019 4:17 pm

Week 2 homework can be on the fundamentals or quantum world since lectures are on QW but the test during W2 is on the fundamentals. The Week 3 homework must be on the QW though.

Alan Cornejo 1a
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Joined: Fri Aug 30, 2019 12:15 am

Re: Week 2 Homework Problems

Postby Alan Cornejo 1a » Sun Oct 13, 2019 9:40 pm

You have the option of either doing more problems from week 1 of Chem review or the quantam world

Ruth Glauber 3L
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Re: Week 2 Homework Problems

Postby Ruth Glauber 3L » Sun Oct 13, 2019 11:00 pm

I believe it is from the review section and the quantum section.

aphung1G
Posts: 33
Joined: Sat Aug 24, 2019 12:15 am

Re: Week 3 Homework Problems

Postby aphung1G » Tue Oct 15, 2019 11:13 pm

For part a what equation can be used to solve for wavelength?

The velocity of an electron that is emitted from a
metallic surface by a photon is 3.6x10^3 kms
(a) What is
the wavelength of the ejected electron? (b) No electrons are
emitted from the surface of the metal until the frequency of
the radiation reaches 2.50 3 1016 Hz. How much energy is
required to remove the electron from the metal surface?
(c) What is the wavelength of the radiation that caused photoejection of the electron? (d) What kind of electromagnetic
radiation was used?

Lizette Noriega 1H
Posts: 37
Joined: Wed Sep 18, 2019 12:15 am

Re: Week 2 Homework Problems

Postby Lizette Noriega 1H » Wed Oct 16, 2019 4:16 pm

RichBollini3C wrote:
Diana Chavez-Carrillo 3J wrote:Are the TA's grading our homework based on completion or correctness?

I believe they are grading based on correctness.


Do you know if all the TAs grade based on correctness or does it vary from TA to TA?

bellaha3L
Posts: 36
Joined: Wed Sep 18, 2019 12:20 am

Re: Week 2 Homework Problems

Postby bellaha3L » Wed Oct 16, 2019 11:11 pm

aphung1G wrote:Does anyone know the energy of microwaves?

Arrange the following types of photons of electromagnetic
radiation in order of increasing energy: g -rays, visible light, ultraviolet radiation, microwaves, x-rays.


microwaves would have the least energy!

RichBollini3C
Posts: 24
Joined: Wed Sep 18, 2019 12:18 am

Re: Week 2 Homework Problems

Postby RichBollini3C » Thu Oct 17, 2019 1:26 pm

Lizette Noriega 1H wrote:
RichBollini3C wrote:
Diana Chavez-Carrillo 3J wrote:Are the TA's grading our homework based on completion or correctness?

I believe they are grading based on correctness.


Do you know if all the TAs grade based on correctness or does it vary from TA to TA?


I believe it varies because I know some TAs that are grading based on solely completion.

melinak1
Posts: 25
Joined: Tue Sep 24, 2019 12:17 am

Re: Week 2 Homework Problems

Postby melinak1 » Fri Oct 18, 2019 1:18 am

KTran 1I wrote:
Abraham De Luna wrote:He specified to do either fundamentals or quantum world for homework 2.

Would there be any benefit to do one or the other, such as if one would better prepare us for a test or quiz?


i think so, it couldnt hurt to practice since we dont know whhat the exam will be like

aphung1G
Posts: 33
Joined: Sat Aug 24, 2019 12:15 am

Valence Electrons

Postby aphung1G » Fri Oct 18, 2019 7:36 pm

How do you determine which are the valence electrons after you write out your electron configuration?

Rosa Munoz 4D
Posts: 43
Joined: Wed Sep 18, 2019 12:21 am

Re: Week 2 Homework Problems

Postby Rosa Munoz 4D » Sun Oct 20, 2019 9:00 pm

Do whatever section we are covering in lecture. If he hasn't gone over it, don't do it.

AnayaArnold_3L
Posts: 30
Joined: Wed Sep 18, 2019 12:19 am

Re: Week 2 Homework Problems

Postby AnayaArnold_3L » Sun Nov 03, 2019 10:44 pm

Yes, they are!
Lauren Sanchez 3D wrote:Just to make sure, the homework problems are now due during our actual discussions right?

AnayaArnold_3L
Posts: 30
Joined: Wed Sep 18, 2019 12:19 am

Re: Valence Electrons

Postby AnayaArnold_3L » Sun Nov 03, 2019 10:45 pm

The valence electrons are the number of electrons you have.
aphung1G wrote:How do you determine which are the valence electrons after you write out your electron configuration?


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