ch7_2009.notebook
January 21, 2009
Jan 13­10:34 AM
1
ch7_2009.notebook
January 21, 2009
How many sets of valid quantum numbers can you write for n = 5?
Jan 20­8:39 AM
2
ch7_2009.notebook
January 21, 2009
How many sets of valid quantum numbers can you write for n = 5?
Jan 13­10:44 AM
3
ch7_2009.notebook
January 21, 2009
How many quantum numbers can be written with n = 3, and l = 2
How many quantum numbers can be written with n = 3, l = 0?
Jan 20­8:53 AM
4
ch7_2009.notebook
January 21, 2009
What is the ground state electron configuration of antimony?
The valence electrons are all of the electrons in the highest n.
How many valence electrons does Sb have?
Group
Valence e­
Valence electrons are lost first in cations.
What is the electron configuration of the Mn2+ ion?
Jan 20­9:15 AM
5
ch7_2009.notebook
January 21, 2009
What is the electron configuration of Cobalt?
What is the ground state electron configuration of tellurium?
Waht is the ground state electron configuration of cadmium?
What is the ground state configuration of Dy?
Jan 20­10:20 AM
6
ch7_2009.notebook
January 21, 2009
Jan 20­8:22 AM
7
ch7_2009.notebook
January 21, 2009
Consider the following energy levels of a hypothetical atom. E4 ­1.0 10­19 J
E3 ­5.0 10­19 J
E2 ­10 10­19 J
E1 ­15 10­19 J
(a) What is the wavelength of the photon needed to excite an electron from E1 to E4?
1 nm
(b) What is the energy (in joules) a photon must have in order to excite an electron from E2 to E3?
2 J
(c) When an electron drops from the E3 level to the E1 level, the atom is said to undergo emission. Calculate the wavelength of the photon emitted in this process.
3 nm
Jan 21­9:41 AM
8
ch7_2009.notebook
January 21, 2009
Jan 21­9:48 AM
9
ch7_2009.notebook
January 21, 2009
Jan 21­9:51 AM
10