Atomic Model Lesson

Atomic Model Lesson

by Andrew Baldwin

Poll

Rate your confidence on the Atomic Model.

Multiple Choice

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. It shows electrons floating freely in a positive region.

• The "Plum Pudding Model" of the atom

• The "Rutherford Model" of the atom

• Democritus's model of the atom

• The "Quantum Mechanical Model" of the atom

Multiple Choice

In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back.  What did we conclude because of this?  

• Atoms are small indivisible spheres

• Atoms are mostly empty space with a small, dense, positive center

• Atoms have negatively charged particles which orbit the nucleus

• Light is a wave, not a particle

Multiple Choice

Which scientist is responsible for first stating that all the atoms of a particular element are identical but are different from the atoms of all other elements?

• Dalton

• Thomson

• Aristotle

• Democritus

• Proust

Multiple Choice

Chadwick is credited with discovering which part of the atom?

• nucleus

• protons

• electrons

• neutrons

Multiple Choice

Who is credited with developing model D?

• Thomson

• Dalton

• Bohr

• Rutherford

Poll

Rate your confidence on this lesson. 

• Move over it's my turn Mr. Baldwin!

• I can do it, but I can't explain it. 

• I can do it but I don't feel confident.

• I don't know that it makes sense yet.