Texas Education Agency
Texas Gateway: Ap Physics I: Appendices: Atomic Masses
This is a chart of the elements including the atomic mass, atomic number, symbol, half-life, and more.
CK-12 Foundation
Ck 12: Physical Science: Atomic Number
[Free Registration/Login may be required to access all resource tools.] Definitions of atomic number and mass number.
CK-12 Foundation
Ck 12: Physical Science: Atomic Number
[Free Registration/Login may be required to access all resource tools.] Definitions of atomic number and mass number.
Sophia Learning
Sophia: Atomic Number
Learn what atomic number is, and what happens if the numbers of protons in an atom changes.
CK-12 Foundation
Ck 12: Isotopes and Atomic Mass
[Free Registration/Login may be required to access all resource tools.] In the following online tutorial students will be asked to define atomic number, mass number and understand how isotopes differ from one another. They will be able...
Khan Academy
Khan Academy: Biology: Chemistry of Life: Atomic Number,atomic Mass,and Isotopes
Learn the fundamental properties of atoms in this article. Understand the definition of atomic number, atomic mass, and isotopes. [6 min, 50 sec]
Chem Tutor
Chem Tutor: Atomic Structure: Atomic Weights and Atomic Numbers
This lesson explains many basic concepts of atomic structure. It starts with atomic mass and number and then works up to more sophisticated information on electron configuration and how each element fits into the Periodic Table.
Wikimedia
Wikipedia: Atomic Number
Wikipedia provides the definition of the term, "Atomic number," a term used in chemistry and physics to represent the number of protons in the nucleus of an atom.
Sophia Learning
Sophia: Atomic Number: Lesson 3
This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 3 of 7 in the series titled "Atomic Number."
Sophia Learning
Sophia: Atomic Number: Lesson 6
This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 6 of 7 in the series titled "Atomic Number."
Sophia Learning
Sophia: Atomic Number: Lesson 5
This lesson explains what is represented by the atomic number, and how it varies from one element to the next. It is 5 of 7 in the series titled "Atomic Number."
American Chemical Society
Middle School Chemistry: Periodic Table
Students explore the periodic table and learn the basic information given for elements: the name, symbol, atomic number, and atomic mass for each element.
Georgia Department of Education
Ga Virtual Learning: Physical Science: Matter and the Atom
Students investigate the structure and parts of the atom, and learn about atomic mass and atomic number. They also explore the differences among solids, liquids, gases, and plasma.
Vision Learning
Visionlearning: Atomic Theory and Structure: Quantum Numbers and Orbitals
Explanation of advanced atomic theory using The Schrodinger equation.
CK-12 Foundation
Ck 12: Chemistry: Atomic Number
[Free Registration/Login may be required to access all resource tools.] Explains the arrangement of the periodic table.
CK-12 Foundation
Ck 12: Chemistry: Mass Number
[Free Registration/Login may be required to access all resource tools.] Shows the calculation of mass number.
City University of New York
John Jay College of Criminal Justice: Atomic Structure
Resource shows the relationships bewteen terms such as atomic number, protons, and isotopes. Simple pictures of atoms help.
Soft Schools
Soft Schools: Atomic Structure Quiz
Take an interactive quiz over the atomic structure and number of elements. After completing the quiz, check your score, and then revisit any incorrect question for further review
University of Colorado
University of Colorado: Physics 2000: Elements as Atoms: Quantum Numbers
Each electron has a set of quantum numbers that specify it's location, orbital, and energy in a unique manner.
Sophia Learning
Sophia: Characteristics of Elements
A podcast [0:39] describing the main characteristics of chemical elements, including the importance of a chemical symbol, atomic number, and atomic mass.
Environmental Chemistry
Environmental chemistry.com: Anatomy of an Atom
Explains the basics of atomic structure, from simple definitions to information about quantum theory. Accurate and helpful basics whether or not you need the more advanced information.
Michael Blaber, PhD
Fsu: Electronic Structure of Atoms: Quantum Mechanics & Atomic Orbitals
This article is provided by Florida State University. Schroedinger wave equation is explained and how quantum numbers are used to describe the energy level of any electron in an atom. The relationship of atomic orbitals to quantum...
Purdue University
Purdue University: Quantum Numbers & Electron Configurations
This site from the Purdue University provides quantum numbers explained in detail and shown how they specify the atomic orbital of each electron and their energy levels. Electronic configurations are explained. Learning exercises with...
State University of New York
State University of New York: Atomic Orbital Energies
This simulation explores the trends observed in orbital energies for the main group elements of atomic orbital energies.
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