good morning! starter: what does an atom look like? today we will… check the starter questions...

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Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about 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.

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Page 1: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Good Morning!Starter: What does an atom look like?Today we will…Check the starter questionsWhat do you know about 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 Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

What is an atom?

Why do you believe that they exist and everything is made out

of them?

Page 3: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

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 Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

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 Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

• Brain Pop

Page 6: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

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 Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Good Afternoon

• Today we will continue our work on the history of the atomic Model

• Starter: Why would the discovery of the electron force us to change our understanding of the atom?

• Goal: Understand the Bohr Model of the atom and how we arrived at the Modern Model.

Page 8: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

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 9: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Atomic Theory and Models

• Thomson suggested that atoms had negatively charged electrons embedded in a positive sphere.

Page 10: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Rutherford found that most particles went through proving that atoms (and everything made of them) are mostly empty space.

Page 11: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

• Rutherford was surprised that a few particles were deflected strongly. This led him to propose an atomic model with a positively charged nucleus.

Page 12: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Close

up of

What

Happened

inside the

gold foil.

Page 13: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Atomic Theory and Models

• Rutherford’s model looked like what you see here with a positively charged nucleus.

Page 14: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

• Bohr figured out that there are levels and developed the Bohr Model

Page 15: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

• We coupled this with knowledge that you can’t predict where the electrons will be.

Page 16: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

• Chadwick’s discovery of the Neutron lead to a reengineering of the nucleus.

Page 17: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

A Brain Pop Quiz

• Brain Pop

Page 18: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Models of Atoms• A summary of visuals

Page 19: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Video

Page 20: Good Morning! Starter: What does an atom look like? Today we will… Check the starter questions What do you know about the Atom? Goal: –determine what

Want to build an atom?

• Atom builder one

• Atom builder two