Ground state

1
See p 124 of text
Excited state
Energy released
Energy added
Ground state
Ground state
2
See p 129-132 of text
Excited state
Ground state
3
The Law of Conservation of Energy requires that
A quantum jump
For absorbance Ef Ei hn
For emission Ef Ei - hn
4
Lab 4/15 4/16
5
Line spectrum of Neon gas See p 108 of text
6
What YOU should know

• Rutherford model of atom
• Bohr model of atom
• Differences and similarities between Bohr and
  Rutherford models
• What is a quantum jump?
• What is a line spectrum? What information does
  it provide with respect to atomic structure?

7
What YOU should know

• How to calculate wavelength of light that is
  emitted (or absorbed) when an electron jumps from
  one energy level to another
• How to calculate a value for the energy of light
  when you are given its wavelength (for lines in a
  line spectrum this value corresponds to the
  energy difference between two electron orbitals
  in an atom)

8
(No Transcript)
9
See p 101 of text
See p 126 of text
Periodic trends are explained by the
distribution of electrons in orbitals!!
10
See p 103 of text
11
See p 126 of text
12
Neutral atoms can gain or lose electrons to form
ions
See p 103 of text
13
See p 104 of text
14
See p 126 of text
15
See p 126 of text
16
Ionization energy

• minimum energy required (in units of kJ/mol) to
  remove the highest energy (i.e. the outermost)
  electron from a neutral atom to form a cation
• Li ? Li e-

17
See p 105 of text
18
See p 106 of text
19
See p 106 of text