About This Chapter
Praxis Physics: Modern Physics and Atomic Structure - Chapter Summary
As an aspiring teacher of physics, you'll need to acquire in-depth knowledge of many related topics. This chapter on modern physics and atomic structure can help you get ready for the Praxis Physics teacher certification examination. Text and video lessons explore the states and changes of matter, the Bohr model, isotopes, and the origins of nuclear power. Early atomic theory and the Heisenberg uncertainty principle are also explained. Study the chapter so that you can eventually:
- Teach your students about the physical and chemical properties of different substances
- Explain chromotography and other techniques for separating a mixture
- Discuss the atomic theories of Rutherford, Millikan, Thomson and Dalton
- Provide information about atomic number, mass number and average atomic mass
- Discuss four quantum numbers and nuclear binding energy
- Define the Heisenberg uncertainty principle, the de Broglie hypothesis and the photoelectric effect
- Teach terminology related to radioactive decay, fusion, carbon dating and fission
- Explain general and special relativity
These short text and video lessons provide you with the flexibility necessary to prepare for the Praxis Physics examination while maintaining your existing schedule. This mode of study makes it easy to use your mobile technology to learn or review online during your spare moments. One way of learning offline is by printing out your test results and worksheets for quick reference whenever possible. Transcripts and an ask-an-expert feature could also be useful to you.
Praxis Physics: Modern Physics and Atomic Structure Chapter Objectives
The computer-based Praxis Physics examination contains six content categories. The fifth of these sections, Modern Physics, and Atomic and Nuclear Structure, reflects the terms, explanations and definitions that were presented throughout this chapter's video lessons. Once you've answered the category's 15 questions, you'll have completed 12% of the examination. Administrators allow approximately 2.5 hours to provide the correct answers to the overall assessment's 125 selected-response questions.
1. Matter: Physical and Chemical Properties
How are substances identified? There are two major ways we can describe a substance: physical properties and chemical properties. Learn about how chemists use properties to classify matter as either a mixture or a pure substance.
2. States of Matter and Chemical Versus Physical Changes to Matter
The world around us is constantly changing. Chemists put those changes into two main categories: physical changes and chemical changes. This lesson will define and provide examples of each.
3. Chromatography, Distillation and Filtration: Methods of Separating Mixtures
What are some ways that mixtures can be separated? Watch this video to explore several examples of ways you can separate a mixture into its individual components.
4. Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan
Imagine firing a bullet at a piece of tissue paper and having it bounce back at you! You would probably be just as surprised as Rutherford when he discovered the nucleus. In this lesson, we are going to travel back in time and discuss some of the major discoveries in the history of the atom.
5. The Bohr Model and Atomic Spectra
Do you ever wonder where light comes from or how it is produced? In this lesson, we are going to use our knowledge of the electron configurations and quantum numbers to see what goes on during the creation of light.
6. Atomic Number and Mass Number
Atoms are the basic building blocks of everything around you. In order to really understand how atoms combine to form molecules, it's necessary to be familiar with their structure. In this lesson, we'll dissect atoms so we can see just what really goes into those little building blocks of matter.
7. Isotopes and Average Atomic Mass
When you drink a glass of water, you are actually drinking a combination of heavy water and light water. What's the difference? Is it harmful? This video will explain the difference between the two types of water and go into detail on the significance of the different isotopes of elements.
8. Electron Configurations & the Four Quantum Numbers
The nucleus of an atom is surrounded by a cloud of electrons. Discover how these electrons are structured around the nucleus by learning about electron configurations and the four quantum numbers.
9. Mass-Energy Conversion, Mass Defect and Nuclear Binding Energy
When you hear the term 'nuclear power,' what comes to mind? Do you know where that energy and power is coming from? In this lesson, we are going to zoom in on the nucleus of a helium atom to explain how something as small as a nucleus can produce an extremely large amount of energy.
10. Radioactive Decay: Definition, Formula & Types
In this lesson, we'll discuss radioactive decay and learn the terms parent nucleus, daughter nucleus, and half-life. We'll also examine three types of radioactive decay.
11. Fusion, Fission, Carbon Dating, Tracers & Imaging: Applications of Nuclear Chemistry
What can the sun do that we can't? How do carbon atoms 'date'? Are radioactive isotopes helpful in the medical field? The answers to these questions can be found in this lesson on the applications of nuclear chemistry.
12. Heisenberg Uncertainty Principle: Definition & Equation
The Heisenberg uncertainty principle is one of the core concepts in quantum mechanics. In this lesson, we define the uncertainty principle and learn more about its implications for physical science.
13. General and Special Relativity: Theory and Examples
Special relativity accounts for the constant speed of light in the absence of surrounding mass. General relativity utilizes the concept of space-time to explain the effect of gravity on the speed of light. This lesson compares special and general relativity and provides examples of how the speed of light is affected by gravity.
14. The de Broglie Hypothesis: Definition & Significance
The de Broglie hypothesis states that particles of matter can behave as both waves and particles, just like light. In this lesson, we'll learn the basics of the de Broglie hypothesis and how it related to other theories released at the same time.
15. The Photoelectric Effect: Definition, History, Application & Equation
In this lesson, you will learn what the photoelectric effect is, how it was discovered, how it applies to everyday life, and the equation associated with it. A short quiz will follow.
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Other chapters within the Praxis Physics (5265): Practice & Study Guide course
- Praxis Physics: Scientific Inquiry & Social Perspective
- Praxis Physics: Scientific Procedures & Techniques
- Praxis Physics: Vectors & Scalars
- Praxis Physics: Kinematics
- Praxis Physics: Motion
- Praxis Physics: Oscillations
- Praxis Physics: Work, Energy & Power
- Praxis Physics: Linear Momentum
- Praxis Physics: Rotational Motion, Collisions & Conservation
- Praxis Physics: Laws of Gravitation
- Praxis Physics: Fluid Mechanics
- Praxis Physics: Electrical Forces & Fields
- Praxis Physics: Potential & Capacitance
- Praxis Physics: Direct Current Circuits
- Praxis Physics: Magnetism
- Praxis Physics: Optics & Waves
- Praxis Physics: Heat, Energy & Thermodynamics
- Praxis Physics: Content Knowledge Flashcards