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welcome to:
!
& Chem 1A. I’m Professor Penner
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today
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about you.
about UCI.
about Chem 1A
about Chemistry
atoms - the building block.
you are a select group
● size of UC Irvine freshman class
for F/2017: ≈8600
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you are a select group
● size of UC Irvine freshman class
for F/2017: ≈8600
● number of apps for F’2018: 116,000
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you are a select group
● size of UC Irvine freshman class
for F/2017: ≈8600
● number of apps for F’2018: 116,000
● rank of this number amongst
all 1300 colleges and universities in
the USA: 3
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you are a select group
● size of UC Irvine freshman class
for F/2017: ≈8600
● number of apps for F’2018: 116,000
● rank of this number amongst
all 1300 colleges and universities in
the USA: 3
● median GPA of 2018 freshman class (you)
= 3.90 (4.05 weighted)
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a few observations
● it’s no accident that you’re here.
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a few observations
● it’s no accident that you’re here.
● you already know how to work hard; you
have developed some good study habits.
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a few observations
● it’s no accident that you’re here.
● you already know how to work hard; you
have developed some good study habits.
● keep doing what you have been doing.
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a few observations
● it’s no accident that you’re here.
● you already know how to work hard; you
have developed some good study habits.
● keep doing what you have been doing.
● college means independence &
increased responsibility.
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a few observations
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● it’s no accident that you’re here.
● you already know how to work hard; you
have developed some good study habits.
● keep doing what you have been doing.
● college means independence &
increased responsibility.
● reduce stress by completing assignments
early. There is no worse feeling than getting
behind.
what’s different from high school?
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● We expect that you will seek additional help.
It is normal to do so. Do not hesitate.
● help from where? Some resources:
● Your T.A.s, & discussion sections,
● LARC (learning and academic resources center)- see:
http://www.larc.uci.edu
● GChem peer tutoring - see:
http://sites.uci.edu/gcptutoring/
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Our Lecture Teaching Assistants:
● Ms.Vivian Chen (2nd yr., analytical chemist)
● Ms. Michelia Dam (1st yr., atmos. chemist)
● Ms. Jessica Pham (1st yr., organic chemist)
a reassurance
● was your HS chemistry course weak?
● did you find the material difficult?
● are you concerned about this class?
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a reassurance
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● was your HS chemistry course weak?
● did you find the material difficult?
● are you concerned about this class?
look…
● …we know you are not a Chem major.
● we know Chemistry is hard.
● we're committed to helping you succeed.
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today
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about you.
about UCI.
about Chem 1A
about Chemistry
atoms - the building block.
I’m proud to be an Anteater
why?
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because we’re the
#1 beach school in the U.S.?
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because we’re the
#1 beach school in the U.S.?
No.
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because we’re the #1 coolest school?
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because we’re the #1 coolest school?
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No.
because we’re the #4 best value?
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https://www.forbes.com/best-value-colleges/#77208702245b
because we’re the #4 best value?
No.
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https://www.forbes.com/best-value-colleges/#77208702245b
(but, let’s be honest:
it’s special to
beat Stanford)
why I’m proud to be an Anteater:
#12 SMI in the U.S.?
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why I’m proud to be an Anteater:
#12 SMI in the U.S.?
yes!!
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your income
it shouldn’t work this way
https://www.brookings.edu/
your parent’s income
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ok, so what’s the
Social Mobility Index?
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the SMI asks: does a university…
● …accept students from low income
homes? what %
● …provide adequate financial aid?
how much?
● …graduate them? what %?
● …and do they get good jobs, and make
good $$? what salary?
…at UCI, the answers are:
● …accept students from low income
homes? yes.
● …provide adequate financial aid?
yes.
● …graduate them? yes.
● …and do they get good jobs, and make
good $$? yes.
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UCI: the #2 R1 University in the U.S.
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Q: “Professor Penner,
#12 doesn’t sound that great…”
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Q: “Professor Penner,
#12 doesn’t sound that great…”
A: “Hey, there are 1363 colleges &
universities in the U.S.!
12/1362 x 100% = 0.8%!!”
let’s pause to recognize the CSU’s
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#12 out of how many? 1363
here are the worst three:
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today
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about you.
about UCI.
about Chem 1A
about Chemistry
atoms - the building block.
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our Canvas website:
https://canvas.eee.uci.edu/courses/11109
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announcements:
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announcements:
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FAQs:
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FAQs:
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syllabus:
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syllabus highlights:
:: we have three amazing Lecture T.A.s:
Vivian Chen (analytical), Michelia Dam
(atmospheric), & Jessica Pham (organic)
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syllabus highlights:
:: we have three amazing Lecture T.A.s:
Vivian Chen (analytical), Michelia Dam
(atmospheric), & Jessica Pham (organic)
:: please don’t print anything. It’s just not
necessary. It will reside at this URL in
perpetuity. Let’s be environmentally
responsible.
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my (embarrassing) Thermo website
from 22 yrs ago
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syllabus highlights:
:: we have three amazing Lecture T.A.s:
Vivian Chen (analytical), Michelia Dam
(atmospheric), & Jessica Pham (organic)
:: please don’t print anything. It’s just not
necessary. It will reside at this URL in
perpetuity. Let’s be environmentally
responsible.
:: now, let’s talk about the textbook.
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please don’t buy this book
2nd Ed.
$171.45
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the Hill
$168.55
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2nd Ed.
1st Ed.
$171.45
$28.00
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topic
Tro 1st Tro 2nd
units, meas.
2
E
atoms
1
1
QM
3
2
periodic
properties
molecules &
compounds
chemical
bonding 1
4
3
5
4
6
5
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there, I just saved
you $140…
…now, spend $11
of it on this
book.
syllabus highlights:
:: Your grade will be determined based upon
the following weighting scheme:
2 writing assignments 1%
homework 9%
Midterm Exam 1 20%
Midterm Exam 2 30%
Final Exam 40%
Total =
100%
:: a curve will be used to assign grades based on
this scheme. The curve will not be determined until
the end of the quarter.
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here is last year’s curve:
weighted course %
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advice for Chem 1
● exams are 90% of your grade.
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advice for Chem 1
● exams are 90% of your grade.
● exams emphasize problems.
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advice for Chem 1
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● exams are 90% of your grade.
● exams emphasize problems.
● do problems - in addition to those
assigned through Sapling.
advice for Chem 1
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● exams are 90% of your grade.
● exams emphasize problems.
● do problems - in addition to those
assigned through Sapling.
● take advantage of discussions, and our
amazing T.A.s. They want to help.
advice for Chem 1
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● exams are 90% of your grade.
● exams emphasize problems.
● do problems - in addition to those
assigned through Sapling.
● take advantage of discussions, and our
amazing T.A.s. They want to help.
● minimize stress: Stay ahead of your
assignments.
your to-do list
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get a book & solutions manual.
register for Sapling.
*do “Practice Assignment” (5 pts)
*do “Math Review” (5 pts)
*start HW E (50 pts)
read Tro 1st Ed. Chapter 1(“Atoms”).
It’s the same as Tro 2nd Chapter 1
*note: these assignments are due
Sat., Oct. 6, 6:00pm (-10%/day for late assignments)
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today
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about you.
about UCI.
about Chem 1A
about Chemistry
atoms - the building block.
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chemistry: the central science
(a chemist’s view of the world)
physics teaches us fundamental
fields and forces
everything
starts here
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…but in the real world, we need to
assemble atoms into molecules…
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…before we can make cells, organs,
rocks, and everything else
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it matters
• chemistry gives us the rules
governing the assembly of matter.
• chemistry predicts the properties
of this assembled matter…
•…and all matter is assembled from
atoms.
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what chemists do…
drugs matter
diabetes,
infectious disease,
cancer,
heart disease
“chemicals” matter
polymers, elastomers
insecticides, fertilizer
building materials, glass,
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infectious disease,
cancer,
heart disease
what chemists do…
“chemicals” matter
polymers, elastomers
insecticides, fertilizer
building materials, glass,
light-responsive materials
devices matter
replacement body parts
biosensors
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building materials, glass, 1- 73
light-responsive materials
what chemists do…
devices matter
replacement body parts
biosensors
electrical therapeutics
imaging
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you’ll need chemistry…
•
•
•
•
•
•
•
•
•
…if you are a doctor or a veterinarian,
a dentist,
a medical technician
an engineer,
a farmer,
a chef,
a biologist (of any kind),
a nurse,
or, a chemist.
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today
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about you.
about UCI.
about Chem 1A
about Chemistry
atoms - the building block.
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atoms
Lecture 1, Thursday Sept. 27, 2018
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water
1 mm
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water
0.28 nm
this is the smallest unit of matter
that has all the properties of water.
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all of the properties of this…
1 mm
…such as…
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freezing point.
vapor pressure.
density.
viscosity.
polarity.
dielectric constant.
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…are encoded by this tiny thing!
0.28 nm
mass = 3.0 x
-23
10
g
we call it a molecule.
0.28 nm
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we call it a molecule.
0.28 nm
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molecules are made up of atoms
an oxygen atom
hydrogen atoms
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matter comes in 3 flavors:
solid
liquid
gas
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pure and impure matter:
pure substances
are elements
or compounds
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impure substances are mixtures:
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zoom in on one atom…
electron
proton
hydrogen is the simplest atom.
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actually, 3 types of subatomic
particles in atoms:
particle symbol charge
electron e or
e
-1
proton p or
+
p
+1
neutron n or
0
n
0
mass
mass
(amu)
9.11 x 0.00054
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10 g
1.67 x
1
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10 g
1.68 x
1
-24
10 g
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actually, 3 types of subatomic
particles in atoms:
e,
+
p,
1
1
0n
e,
+
p,
8
8
8n
e,
+
p,
11
11
12 n
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Q: how did we discover
subatomic particles?
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Q: how did we discover
subatomic particles?
A: well, “we” didn’t do it.
JJ Thompson did.
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J.J. Thomson
1856 –1940
● discovered the first
subatomic particle
(1887).
● proved atoms were
divisible.
● measured mass/charge
of electrons
● won Nobel prize
(1906)
how did he do it?
read more about it:
http://web.lemoyne.edu/~GIUNTA/thomson1897.html
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how did he do it?
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how did he do it?
anode
slits
cathode
(electron source)
Vtop
fluorescent
screen
pair of metal electrodes
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Vtop = positive
electron beam deflects up.
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Vtop = negative
electron beam deflects down.
Thompson calculates:
8
charge/mass ratio: 1.76 x 10 C/g
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Vtop = negative
electron beam deflects down.
Thompson calculates:
8
charge/mass ratio: 1.76 x 10 C/g
…but he doesn’t know the mass!
so he doesn’t know the charge.
George
Johnstone Stoney
1826 –1911
…came up with the
name “electron”
(even before
Thomson’s
experiments - how?!).
Greek for amber.
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allow me to anticipate your next
question:
Q: Prof. Penner, is this on the exam?
A: yes.
(b/c everything is on the exam.)
Robert Millikan
1856 –1940
● did a wild experiment
to measure the charge
of an electron…
●…at Univ. of Chicago in
1907….
● …& he won the
Nobel prize (1923)
●
st
1
president of
Caltech (1921).
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how did he do it?
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how did he do it?
• The experiment
:: measured the strength of the electric
field required to halt the free fall of
the oil drops;
:: determined the mass of oil drops from
their radii (size) and density.
• The charge, q, of each oil drop was always a
whole-number multiple of 1.60 × 10–19 C.
This is the fundamental charge of a
single electron.
• mg = qE (g is acceleration of gravity, E is the E-field)
Millikan
1.602 x
-19
10 C
Millikan Thomson
-19
10 C
1.602 x
8
-1
(1.76 x 10 C/g)
Millikan Thomson
-19
10 C
1.602 x
8
-1
(1.76 x 10 C/g)
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9.10 x 10 g
per electron
110
in this lecture
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about Chem 1A
about Chemistry
atoms - the building block.
who knew? (and how did
we find out)
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