Online College Courses for Credit

Ch 4.3 Modern Atomic Theory

Ch 4.3 Modern Atomic Theory

Author: deirdre carney
  • Describe Bohr’s model of the atom and evidence for energy levels
  • Explain how the electron cloud model represents the behavior and locations of electrons in atoms
  • Distinguish the ground state from excited states of an atom based on electron configuration

Nevada Science Standards

P.12.A.9 Students know the number of electrons in an atom determines whether the atom is electrically neutral or an ion. I/S 

Next Generation Science Standards

HS-PS1-8. Develop models to illustrate the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.

HS-PS3-2. Develop and use models to illustrate that energy at the macroscopic scale can be accounted for as a combination of energy associated with the motions of particles (objects) and energy associated with the relative positions of particles (objects).

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

29 Sophia partners guarantee credit transfer.

312 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.


Video Clip: The Manhattan Project


Chapter 4.3 Modern Atomic Theory

Read Chapter 4.3 Modern Atomic Theory pg 113-118. Outline the reading in your science notebook and include major points and diagrams/tables.
you should focus on the following essential questions:
- What can happen to electrons when atoms gain or lose energy
-What model do scientists use to describe how electrons behave in atoms
-What is the most stable configuration of electrons in an atom


Source: Prentice Hall Physical Science - Concepts in Action

Video Clip: The History of Atoms

Watch video and take notes in your science notebook.

Video Clip: Bohr Model of the Atom

Watch video and take notes in our science notebook.

Video Clip: Orbitals

Watch video and take notes in your science notebook. Focus on getting a good idea about ENERGY LEVELS. We will not be writing the electron configuration for atoms.