development of the atomic theory part 1
DESCRIPTION
For my students: this is a story of the beginning of the development of the atomic theory. Now, you are to first listen to the presentation. Your task will then to pick one of the four choices to complete: 1. Create a storybook complete with pictures that would compliment the presentation. 2. Create a diorama to tell a similar story 3. Make models of each stage of development. 4. Create a story for part 2 of the development of the atomic theory that will be coming up.TRANSCRIPT
- 1. Development of the Atomic Theory Part 1
A story of something you cannot even see.
2. Lets Think About It.
3. Democritus 440 B.C.
Solid
Homogeneous
Indestructible
Atomos!
4. John B. Dalton Late 1700s
All matter is composed of atomsAtoms cannot be made or destroyedAll
atoms of the same element are identicalDifferent elements have
different types of atomsChemical reactions occur when atoms are
rearrangedCompounds are formed from atoms of the constituent
elements.
5. JJ Thomson 1897
The atom is no longer indestructible!
Found the electron!
(He called them corpuscles.)
Electrons have a negative charge.
To keep the atom neutral, the electron were thought to float in
some kind of positive jelly.
This was known as the Plum-pudding model.
6. Resources
Gregory L. Curran. Development of the Atomic Model, Lesson 3-2.
Copyright 2004 Fordham Preparatory School, All Rights Reserved.Last
ModifiedFebruary 07, 2008.
http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson32.htm
Introduction of Matter, Book K. Holt, Rinehart, and Winston, Austin
TX, 2002.
7. Websites of screencaptures
http://v1kram.posterous.com/great-indians
http://library.thinkquest.org/28383/nowe_teksty/htmla/2_5a.html
http://www.tutorvista.com/content/physics/physics-iv/atoms-and-nuclei/thomsons-model.php
http://www.kentchemistry.com/links/AtomicStructure/JJThompson.htm