BOHR'S MODEL: October 15, 2010

Now that you know the history of atomic theory, let's move on to the more modern stuff, such as Bohr's atomic model!

BOHR (1920S)

• Rutherford's model was inherently usable (protons and electrons should attract to eachother, no?)
• Matter emits light when it is heated (black body radiation)
• Light travels as photons
• The engerdy photons carry depend on their wave length
• Bohr based his model on the engery (light) emitted by different atoms
• - Each atom has a specific spectra of light
• To explain this emission spectra, Bohr suggested that electrons occupy shells or orbitals

Summerizing Bohr's Theory

• Electrons exist in orbitals
• When they absorb energy, they move to a higher orbital
• As they fall from a higher orbital to a lower one, they release energy as a photon of light

Hmm...

When electrons move from level to level (depending on the energy), they don't travel there, they actually just appear there, you could call it "transporting".

This led to us learning (by questioning Mr.Doktor) that scientists have tried harnessing this power to transport more than just an electron. Too bad the most they've ever managed to transport was about 5 atoms...

Still, we never know what lies in the future! Maybe one day we will all quit walking and physical activity and just transport everywhere we go!

Borh-d? (Get it?...Haha.)

Check out

http://phet.colorado.edu/en/simulation/hydrogen-atom

to play around with a hydrogen atom and see many of the different atomic models!

Post by Adrienne Ross