Atomic Model Timeline Project
1. Be chronological in its sequence, with the dates clearly shown (it
need not be to scale).
2. Contain, through pictures and/or explanations the significant
contributions and experiments of those scientists and atomic
models listed above.
3. Be neat and legible.
4. Be larger than 8.5 x 11 inch size.
Your timeline is due on ____________________
You do not have to follow the typical horizontal timeline format; you may be
creative and use any format you wish. We will spend some class time in the
Computer Lab to assist in your research or you can stop by during help night.
ONE FINAL NOTE: No late timelines will be accepted.
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Introduction:
If you were asked to draw the structure of an atom, what would you
draw? Throughout history scientists have accepted five atomic
models. Our perception of the atom has changed from the early
Greek model because of clues or evidences that have been gathered
through scientific experiments. As more evidence was gathered old
models were discarded or improved upon. Your goal is to trace the
atomic theory through history.
Task:
You and your partner will search the Internet sources provided to learn
more about the scientists and discoveries that have led to our current
knowledge of the structure of the atom.
Using your research, construct a timeline as a visual representation of the
development of modern atomic theory.
Draw the five historical models of the atom - Democritus, Thomson's Plum
Pudding, Rutherford, Bohr, Modern Electron Cloud
Process:
You will be assigned 1 partner.
Read the whole direction.
Get out your notes from Chapter 11.
Use any of the following Web sites to get information about
listed scientists and their discoveries that were not in your
text. You may search other Web sites on your own or use
library resources.
Organize the following information on the Timeline:
Names of all 15 scientists in the table below
The year of the scientists discovery
2
In 1-2 sentences tell the importance of the discovery that
relates to the structure of the atom (some of these people did
many types of research)
Pictures of the five historical models of the atom – Dalton,
Thomson's Plum Pudding, Rutherford, Bohr, Modern Electron
Could model
Marie &
John
James
Ernest Antoine
Pierre
Dalton Chadwick Rutherford Lavoisier
Curie
J.J.
Robert Michael
Henri
Democritus
Thomson
Becquerel Millikan Faraday
Joseph
Albert
Max
Louis Neils Bohr
Aristotle
Einstein Planck
Proust
A timeline is in chronological order – earliest time to latest time. Because
your are going to keep your comments to 1-2 sentences, a graph or report
will not be appropriate. If you would prefer to do a PowerPoint presentation
or chart, please discuss with the teacher and get pre-approval (example can
be found on http://www.foodtimeline.org/.
Conclusion:
This assignment is based on 100 points. You can earn extra points by
making models to display in the classroom or making a large timeline
with pictures of the scientists. See the teacher for details.
This assignment will allow you to observed how the Atomic Theory
started as a philosophical idea and through quantatative
experimentation, has been developed to include the current
Electron Cloud Model. You will see that as scientists discovered
more and more information they discarded parts of older theories
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to design an atomic model that provided a more accurate
representation of the atom. It is important for scientists to
challenge current theories and modify them as more knowledge
becomes available. Your research provides you with a historical
perspective of our knowledge of the atom's structure.
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Resources:
History
Atomic Structure Timeline:
http://www.watertown.k12.wi.us/HS/Staff/Buescher/atomtime.asp
(Click cancel if asked for a password)
Atom - The Incredible World:
http://library.thinkquest.org/19662/low/eng/index.html
Atomic Structure Table of Contents:
http://www.dbhs.wvusd.k12.ca.us/webdocs/AtomicStructure/Atomi
cStructure.html
List of Historical Contributors and Developments Related to Atomic Theory:
http://www.hometown.aol.com/eilatlog/taxons/history.html
Encarta - Atom:
http://encarta.msn.com/encyclopedia_761567432_9/Atom.html
The History of Atomic Theory:
http://www.lancs.ac.uk/ug/cooked1/index.htm (info about Thomson's
Plum Pudding under Modern Atomic Theory section)
History of the Atom:
http://www.winneconne.k12.wi.us/middle_school/7th%20Grade/LEN
Z/Mr.%20Lenz's%20Page.htm (Click cancel if asked for a password. Go to
Chemistry link at bottom left, then to History of Atomic Theory at top left on next page.)
Models
The Atom - Info and Democritus, Plum Pudding, Rutherford Models:
http://www.lbl.gov/abc/wallchart/chapters/02/1.html
Modern Model of the Atom: http://www.aplus.net/tom/mercer/edsc651physci/modelatom.htm
Plum Pudding and Bohr Model: http://wwwoutreach.phy.cam.ac.uk/camphy/nucleus/nucleus1
History of the atom - Info and Plum Pudding, Rutherford, Bohr models:
http://www.broadeducation.com/htmlDemos/AbsorbChem/HistoryA
tom/page.htm
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Evaluation:
Category
Dates/Scientists
9x-max 45pt
Contribution to
Atomic
Theory
5
4
3
2
6 or fewer
All scientists
scientists
12 scientists 9 scientists
listed Dates
listed or 3 listed or 6 out listed or 9
are correct
out of order.
out of order.
of order.
and in order.
18 pt
36 pt
27 pt
45pt
All
contributions
listed and
apply to
Atomic
Theory.
2-3 errors contributions
not listed or
do not apply
to Atomic
Theory.
4-6 errors contributions
not listed or
do not apply
to Atomic
Theory.
7-9 errors contributions
not listed or
do not apply
to Atomic
Theory.
6x-max 30 pt
Models of
Atoms
4x-max 20 pt
30 pt
24 pt
18 pt
12 pt
All 5 models 4 models
3 models
2 models
correct
drawn
drawn
drawn
pictures and correctly and correctly and correctly and
correctly
correctly
correctly
correctly
named.
named.
named.
named.
20 pt
Attractiveness
1x-max 5 pt
Timeline and
models are
exceptionally
attractive in
terms of
layout,
neatness, and
use of color.
16 pt
Timeline
and models
are attractive
in terms of
layout,
neatness,
and use of
color.
5 pt
4 pt
12 pt
8 pt
Timeline and
models are
acceptably
attractive in
terms of
layout,
neatness, and
use of color.
Timeline
and models
are messy
with no use
of color.
They are not
attractive.
3 pt
2 pt
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