Download Atomic Model Timeline Designed by Susan Schmidt Introduction: If

Atomic Model Timeline
Designed by Susan Schmidt
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:
Read the entire WebQuest.
You can look in a textbook Chapter 4 Pg. 104-108.
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.
Include the following on your timeline:
1. Names of all 13 scientists in the table below
2. The year of the scientists discovery
3. 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)
4. Draw the five historical models of the atom – Democritus, Thompson's Plum
Pudding, Rutherford, Bohr, Modern Electron Cloud model. If you copy the models
off the internet you will need to provide a source page with the website you copied
the picture off of.
Marie &
James
Ernest
Antoine
John Dalton
Pierre Curie
Chadwick Rutherford Lavoisier
J.J.
Democritus
Thompson
Joseph
Louis
Proust
Neils Bohr
Max
Planck
Robert
Millikan
Michael
Faraday
Aristotle
A timeline is in chronological order – earliest time to latest
time. Because you are going to keep your comments to 1-2 sentences, a graph or report will
not be appropriate. You can hand write the whole assignment or you can create a timeline
on a word document. I will be showing how to do this in class.
Resources:
History
Atom - The Incredible World:
http://library.thinkquest.org/19662/low/eng/index.html
The Atom - Info and Democritus, Plum Pudding, Rutherford Models:
http://www.lbl.gov/abc/wallchart/chapters/02/1.html
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.neoam.cc.ok.us/~rjones/Pages/online1014/chemistry/chapter_8/pages
/history_of_atom.html
Evaluation:
Category 5
Dates/Scientists
All points in this
category are 2X
All points in this
3
All scientists
12 scientists 9 scientists
listed Dates are
listed or 3 listed or 6 out
correct and in
out of order. of order.
order.
10 Pts
Contribution to
Atomic
Theory
4
All contributions
listed and apply
to Atomic
Theory.
8pts
6pts
2-3 errors contributions
not listed or
do not apply
4-6 errors contributions
not listed or
do not apply
2
6 or fewer
scientists
listed or 9
out of order.
4pts
7-9 errors contributions
not listed or
do not apply
category are 2X
Models of
Atoms
Appearance/
Grammar,
Spelling
to Atomic
Theory.
to Atomic
Theory.
to Atomic
Theory.
8pts
6pts
4pts
4 models are
All 5 models are
correct and
correct and
correctly
correctly named.
named.
3 models are
correct and
correctly
named.
2 models are
correct and
correctly
named.
Timeline and
models are
Timeline and
attractive in
models are
terms of
exceptionally
layout,
attractive in
terms of layout, neatness,
and use of
neatness, and
use of color. 1-2 color. 3-4
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. 7-8
10pts
Spelling errors.
Spelling errors.
Spelling errors.
5-6 Spelling
errors.
Conclusion:
This assignment is based on 30 points.
This assignment will allow you to observe how the Atomic Theory started
as a philosophical idea and through quantitative 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 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.
Credits:
This WebQuest is based on a template from The WebQuest Page and was last updated
September 11, 2005.
Textbook: Modern Chemistry, Holt, Rinehart and Winston Copyright 2002