Day 8: 7.7
LS 17a) Which has the larger atomic radius?
LS 17b) Which has the larger ion radius?
LS 17c) Which has the most negative electron affinity?
LS 17d) Which has the most negative electron affinity?
Lec Sup # 14b
Write the electron configuration for Cu+
Lec Sup # 14c
Write the electron configuration for Cu2+
Be sure to look at sample integrative exercise 6 on page
Lec Sup # 8
Write the electron configuration for S
Write the electron configuration for W
Lec Sup # 9
Write the electron configuration for Fe
Lec Sup # 10
Write the el
The Electron affinity of an atom is the energy change when an electron is added
to the neutral atom to form a negative ion. This property can only be measured
in an atom in gaseous state.
Electron Affinity Trends
Period Trend: becomes in
3. Magnetic quantum number (ml)
Can have values between
l and l, including zero.
Ex: if l = 1 then ml = -1,0,+1
This quantum number expresses orientation in space of the orbital.
4. Electron spin
Electrons spin on their own axis.
Fourth quantum number is
Period Trend: decreases Left to Right
There is no increase* in shielding electrons within a period.
However, the nucleus becomes more + with added protons and thus has a
stronger electrostatic force of attraction to the valence shell.
Electron shell / Energy Level:
a collection of orbitals with the same value of n.
All orbitals with n=4 are in the 4th shell.
2) Azimuthal quantum number (l)
Second quantum number
Values from 0 to n-1
This value defines the shape of the orbital.
Day 1: 6.1 6.2
Wave Nature of Light
All light, including visible light is a form of electromagnetic radiation.
Electromagnetic radiation carries radiant energy through space.
All EM radiation carries energy through
State at which the electron
has been removed from the atom.
Zero-energy state is higher in energy than the states with negative energies.
Bohrs next big assumption was that when electrons jumped from one allowed state to
the next they di
2. What is the energy of the radio wave associated with 95.5 MHz
6.33 X 10^-26 J/quantum
2.08 X 10^-33 J/quantum
6.04 X 10^-7 J/quantum
3. Laser used for eye surgery has a frequency of 4.69 x 1014s-1. What is the
6.40 X 10^
Braggs diffraction of x-rays shows they show properties of waves.
Light is a Particle
Einsteins explanation of the photoelectric effect shows quantized energy of light.
Compton effect shows that EM waves have the property of momentum (so did
Day 2: 6.3 -6.4
In 1905 Einstein used
Plancks theory to
A spectrum containing radiation of only specific wavelengths.
Emission Spectra vs Absorption Spectra
Line spectrum of hyd