Atoms and Atomic History

Open Ended

What is something interesting that happened over the holidays?

History of
the Atom

Why am I here? Why do I care?

• Understand that science knowledge changes over time

• Identify that there are tiny particles inside of an atom and these different particles explain why elements are different and why/how they react.

Today, we are learning about how we have come to know what an atom is and what goes on inside them.

This is important for us to know so that we can:

Multiple Choice

Who was the first person to come up with the idea of the “atom?”

• Bohr

• Dalton

• Democritus

• Aristotle

Multiple Choice

J.J. Thomson discovered which atomic particle?

• Nucleus

• Proton

• Neutron

• Electron

Multiple Choice

What occurred during Rutherford’s experiment that lead to his discovery of the nucleus?

• The particles all went right through the gold foil

• All of the particles bounced off the gold foil

• Most of the particles went through the gold foil but a few bounced off at large angles

• Half of the particles bounced off the gold foil and half went through it

Multiple Choice

Who developed the "chocolate chip cookie" model of the atom?

• Ernest Rutherford

• J.J. Thomson

• John Dalton

• Niels Bohr

• Werner Heisenberg

1. I have uploaded an activity to google classroom

2. There are two activities to complete on the worksheet

3. Finish them both before getting a crossword!

Task

​Timers: 10 15 20

Reorder

Exit Card Question

Place the scientists who developed the different models of the atom in order from earliest to most recent.

• Democritus

• Dalton

• JJ Thomson

• Rutherford

• Bohr

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5

• 1
• 2
• 3
• 4
• 5