Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and...
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Transcript of Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and...
![Page 1: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/1.jpg)
Good Day! 04/20/23Starter: What does an atom look like?
Today we will…
Look at grade sheets and discover the history of the atom.
• Goal:
– determine what you do and do not know about atoms
– think about why you believe what you believe
– Gain some understanding on how we came to our current thinking on the atom.
![Page 2: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/2.jpg)
What is an atom?
Why do you believe that they exist and everything is made out
of them?
![Page 3: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/3.jpg)
Tear off a piece of paper and rip it in half.
• Now tear it in half again• Now again• Will there come a time where you can’t rip it
in half?• Let’s say you had a shrink ray and could
make yourself smaller so the size of your hands was not an issue.
• Could you then?• Numbers can be “cut” in half forever, why
not paper?
![Page 4: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/4.jpg)
We are not the first to struggle with this concept
• In ancient Greece (400 B.C) a man named Democritus came up with the idea that you will eventually come to a point where you can no longer cut an object in half
• He said you would come to an “uncuttable” object.
![Page 5: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/5.jpg)
• Brain Pop
![Page 6: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/6.jpg)
A choice
• I am about to hand out a worksheet
• You can either work on it by yourself and receive 15/15 if you complete it. Or you can watch a video and powerpoint and get 12/15 if you complete it.
• The choice is yours
• Brain Pop
![Page 7: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/7.jpg)
Atomic Theory and Models
Dalton thought that
• atoms were like smooth, hard spheres that could not be broken into smaller pieces.
• All atoms of an element were identical
• An atom of one element can not be changed into an atom of a different element.
![Page 8: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/8.jpg)
Atomic Theory and Models• Thomson suggested
that atoms had negatively charged electrons embedded in a positive sphere.
• We had to revise our model of the atom because the negative charges had to be balanced by a postive charges to keep the atom neutral.
![Page 9: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/9.jpg)
Rutherford found that most particles went through proving that atoms (and everything made of them) are mostly empty space.
![Page 10: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/10.jpg)
• Rutherford was surprised that a few particles were deflected strongly. This led him to propose an atomic model with a positively charged nucleus.
![Page 11: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/11.jpg)
Close
up of
What
Happened
inside the
gold foil.
![Page 12: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/12.jpg)
Atomic Theory and Models
• Rutherford’s model looked like what you see here with a positively charged nucleus.
![Page 13: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/13.jpg)
• Bohr figured out that there are levels and developed the Bohr Model
![Page 14: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/14.jpg)
• We coupled this with knowledge that you can’t predict where the electrons will be.
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• Chadwick’s discovery of the Neutron lead to a reengineering of the nucleus.
![Page 16: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/16.jpg)
Models of Atoms• A summary of visuals
![Page 17: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/17.jpg)
Video
![Page 18: Good Day! 11/10/2015 Starter: What does an atom look like? Today we will… Look at grade sheets and discover the history of the atom. Goal: –determine.](https://reader036.fdocuments.in/reader036/viewer/2022062517/56649f1b5503460f94c31105/html5/thumbnails/18.jpg)
Want to build an atom?
• Atom builder one
• Atom builder two