Untitled - Kelly Walsh High School

Quantum Theory and Electrons 115
Don’t Forget!
The electrons that are contained in the noble gas core are the core electrons
while the electrons outside the core are valence electrons. These valence electrons
are involved in the chemical behavior of the elements. For the representative
elements, the valence electrons are those s and p electrons in the outermost
energy level. The valence shell contains the valence electrons.
7-6 Utterly Confused About
Matter and Light
Quick Tip
It is only the nearest previous noble gas that is used as the core.
If you are going to be calculating any values concerning matter, light, and energy,
it will help to make a list of the equations. These equations are:
c h/mv E = h E = hc/ (E may replace E)
E 2.18 1018 J a 1
n2
final
1
n2 b
initial
Many students get into trouble because they confuse velocity, v, with frequency, .
Make sure you are not one of these students.
These problems require two constants, Planck’s constant (h 6.63 10 34 Js)
and the speed of light (c 3.00 10 8 m/s). Your instructor may wish you to
memorize these constants; however, through repeated use you will probably
learn these values without any further “memorization.”