Electrons in Motion

1
Electrons in Motion

• A seagull floating on the ocean moves up and down
  as waves pass.

2
Electromagnetic radiation
3
Red vs. Blue Light
4
Electromagnetic Spectrum
5
Lithium gives off red light as it gives away
energy
6
Hydrogen receiving giving off energy
7
Why are there Rainbows?
8

• When some atoms are energized by electricity they
  emit light
• If we break up the light with a crystal we dont
  see a smooth rainbow, but distinct lines, only
  parts of the rainbow
• Every element makes a different rainbow

9
Why do different elements make different
spectrums?

• The color emitted depends on how excited the
  atoms are

10
Each photon emitted corresponds to a particular
energy change.
11
Continuous and discrete energy levels.
12
The difference between continuous and quantized
energy levels.
13
The Bohr model of the hydrogen atom.
14
The valence electrons are the ones farthest from
the nucleus

• Valence electrons are the ones atoms trade and
  share to bond

15
Valence electrons the Periodic table

• Group1 1 valence
• Group 2 2 valence
• Group 13 3 valence
• Group 14 4 valence
• Group 15 5 valence
• Group 16 6 valence
• Group 17 7 valence
• Group 18 8 valence

16
Lewis Dot diagrams

• Shows valence e- as dots around the elements
  symbol

17

• Electrons can move from one place to another
  without being anywhere in between quantum leap
• Heisenbergs uncertainty principle the electron
  is a particle, but it can act like wave
• You can know what path an e- is taking, or you
  can know where it is, but not both
• Unless theres a way of observing something
  without putting any light or energy into it.
• Are there some things we cant know?