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Chemistry Ch 7.4-7.6 (Chang)
Chemistry Chapter 7.4-7.5 University of Toledo
11
Chemistry
Undergraduate 1
10/15/2009

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Term
nodes
Definition
the amplitude of the wave at these points is zero
Term
equaiton expressing the relationship bewteen circumfrerence of and orbit and the the wavelength
Definition

2πr=nλ

π=pi(3.14...)

r=radius

n=integer relating to amount of quantum

λ=wavelength

Term
equation showing how particles and waves are related
Definition

λ=h/mu

m, λ, and u are the wavelengths associated with the moving partices

m=mass

u=velocity

Term
Heisenberg uncertainty principle
Definition
it is impossible to know simultaneously both the momentum(mass times velocity) and the position of a particle with certainty
Term
Heisenberg Uncertainty Principle's Equation
Definition

ΔxΔp≥(h/4π)

There is an inverse relationship of how precise delta x and delta p are, if one grows more precise, the other falters

Term
Electron Density
Definition
gives the probability that an electron will be found in a particular region of an atom
Term
Quantum numbers
Definition
describe the distribution of electrons in hydrogen and other atoms.
Term
Principal Quantum Number
Definition
has integral values, (n) determines the energy of an oribital and respectively the distance from the nucleus. 
Term
Angular Momentum Number
Definition

has the range of numbers from 0 to (n - 1) only including integers

0=s

1=p

2=d

3=f

Term
Magnetic Quantum Number
Definition
m(l) has a range from negative l to positive l, including all integers(including 0) the amount of numbers in the range corrisponds to how many s, p d etc can be on a given level of energy n
Term
Electron Spin Number
Definition

 m(s) is either -1/2 or 1/2

this simply states which direction the electron is spinning

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