About This Chapter
The Atom & Structure of Elements - Chapter Summary
In this chapter, you will learn about the basic structure of the atom and look at how atoms differ from one another. The concepts of mass number and atomic number will be introduced. The formula used to discover molecular weight will be presented.
You will also learn about the energy levels of atoms and valence electrons. After you have reviewed these lessons, you should be prepared to do the following:
- Explain how atoms make up elements on the periodic table
- Describe the structure of an atom
- Determine molecular weight by using a formula
- Outline what a valence electron is and does
As you read through the chapter, contact an instructor if you have additional questions. These study materials are mobile-friendly and available for you to review at any time. You can use the lessons and quizzes to discover where you may need to focus more of your study.
1. The Atom
Tune into this lesson to find out what matters about matter. What exactly is an atom? And, how do the atoms that make up the elements in the periodic table differ from one another?
2. 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.
3. Molecular Weight: Definition & Formula
In this lesson, we will learn about molecular weight, which is the mass of a molecule determined by summing the masses of all of the atoms that make it up. We will look at the formula for determining molecular weight, learn where to find atomic masses on the periodic table, and do an example calculation.
4. Valence Electrons and Energy Levels of Atoms of Elements
The periodic table contains a wealth of information. This lesson will explain how to use it to quickly determine the most useful information about the most important electrons. We will be focusing our discussion on valence electrons and energy levels.
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Other chapters within the NDA Exam Preparation & Study Guide course
- About the NDA Exam
- Algebra Concepts
- Advanced Algebra Concepts
- Solving Matrices & Determinants
- Trigonometry Concepts
- Geometry & Linear Equations
- Analytic Geometry
- Functions, Limits & Continuity
- Derivative Rules
- Calculations & Applications of Derivatives
- Integral Calculus
- Differential Equations & Applications
- Scalars & Vectors in Algebra
- Visualizing Statistics
- Probability Concepts in Math
- Grammar and Usage
- Improving Reading Comprehension
- Measurements in Physics
- Motion in Physics
- Basics of Work, Power & Energy
- Understanding Heat Transfer
- Sound Waves
- Light, Mirrors & Lenses
- Electric Currents & Power
- Scientific Technology, Machines & Tools
- Chemical Properties of Elements & Substances
- Chemical Symbols, Formulas & Reactions
- Qualities of Living Organisms
- Health Science Basics
- Solar System & Eclipses
- Achievements of Famous Scientists
- Indian History
- Overview of Major World History Events
- World Government Types
- The Earth
- Earth's Oceans, Atmosphere & Climate
- Regional Geography of South Asia
- Modern Day Events in India
- NDA Exam Preparation & Study Guide Flashcards