<img src="https://d5nxst8fruw4z.cloudfront.net/atrk.gif?account=iA1Pi1a8Dy00ym" style="display:none" height="1" width="1" alt="" />
Dismiss
Skip Navigation
Our Terms of Use (click here to view) and Privacy Policy (click here to view) have changed. By continuing to use this site, you are agreeing to our new Terms of Use and Privacy Policy.

Chapter 24: Atomic Physics

Difficulty Level: At Grade Created by: CK-12

A scanning electron microscope image of snow crystals, with computer-generated colors.

A scanning electron microscope is a tool that uses electrons to make very sharp images with magnification of up to 500,000x.  Our knowledge of electrons comes from early study of the atom that lead to greater understanding not only of electrons and atomic structuer, but of the nature of all particles.  This chapter covers modeling the atom and atomic spectra, the Bohr atom, and the Uncertainty Principle. 

Chapter Outline

Chapter Summary

1. The Balmer series is an empirical formula which gives the reciprocal of the wavelength λ for each line in the hydrogen spectrum

1λ=R(1221n2),n=3,4,,

The letter R is known as the Rydberg constant of value

R=1.097×107 m1

The integer n is associated with each emission line.

2. Bohr quantized assumptions led to a more general statement of the Balmer series

1λ=R(1n2l1n2h)

where nl is the lower state and nh is the higher state.

3. Bohr’s assumptions for hydrogen atom are:

a. The allowed radii of the atom

rn=n2r1,n=1,2,

where r1 is the smallest orbital radius of the hydrogen atom, commonly referred to as the Bohr radius.

b. The allowable energy levels, or stationary states of the atom

E=E1n2,n=1,2,

c. The difference between allowable energy levels can be expressed as

hf=EhEl

where Eh is a higher energy state of the electron and El is a lower energy state of the electron.

4. The square of the amplitude of the matter wave in Schrodinger’s equation assigns probabilities for the location of the electron.

5. The Heisenberg uncertainty principle is

ΔxΔph2π

where Δx is the uncertainty in position of the particle and Δp is the uncertainty in momentum of the particle.

Image Attributions

Show Hide Details
Description
Difficulty Level:
At Grade
Authors:
Editors:
Subjects:
Date Created:
Jun 27, 2013
Last Modified:
Jun 07, 2016
Save or share your relevant files like activites, homework and worksheet.
To add resources, you must be the owner of the FlexBook® textbook. Please Customize the FlexBook® textbook.
Please wait...
Please wait...
Image Detail
Sizes: Medium | Original
 
Here