Khan Academy
Khan Academy: Isotopes and Mass Spectrometry
Tutorial explains isotopes, atomic weight and how isotopes can be detected using mass spectrometry. Examples are given.
OpenStax
Open Stax: Elements and Atoms, the Building Blocks of Matter
This site provides an overview of elements and atoms, the building blocks of matter.
Department of Defense
Do Dea: Chemistry Review
Review atoms with this slideshow. You can choose to listen to the review or read the accompanying text. At the end, play the game to review the basics of atoms that you have just learned about. You may play the game as many times as...
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: Isotopes and Atomic Mass
[Free Registration/Login may be required to access all resource tools.] Students explain the workings of a mass spectrometer, and describe how this device is used to determine average atomic mass.
CK-12 Foundation
Ck 12: Chemistry: Atomic Mass Unit
[Free Registration/Login may be required to access all resource tools.] Definition of atomic mass unit is discussed.
CK-12 Foundation
Ck 12: Chemistry: Calculating Atomic Mass
[Free Registration/Login may be required to access all resource tools.] Covers definition of atomic mass and calculations of atomic mass.
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.
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.
Physics Aviary
Physics Aviary: Practice Problems: Mass Spectrometer Problem
Determine the mass of two different isotopes of an element based on their deflection by a magnetic field.
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.
CK-12 Foundation
Ck 12: Chemistry Simulation: Average Atomic Mass
[Free Registration/Login Required] Students explore how percent abundances of different isotopes affect the average atomic mass for that given element. Students form connections between the average atomic mass and a person's body mass....
CK-12 Foundation
Ck 12: Chemistry Simulation: Atom Builder Challenge
[Free Registration/Login Required] Learn what makes each element unique by building the mystery atoms in the periodic table.
Sophia Learning
Sophia: Atomic Mass: Lesson 3
This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. It is 3 of 4 in the series titled "Atomic Mass."
Sophia Learning
Sophia: Atomic Mass: Lesson 4
This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. Module includes a slideshow and a quiz.
Sophia Learning
Sophia: Atomic Mass: Lesson 1
This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. It is 1 of 4 in the series titled "Atomic Mass."
Sophia Learning
Sophia: Atomic Mass: Lesson 2
This lesson explains what is represented by the atomic mass, and how it varies from one element to the next. It is 2 of 4 in the series titled "Atomic Mass."
Science Struck
Science Struck: How to Find Protons, Neutrons and Electrons
Brief explanations of how to determine how many protons, neutrons, and electrons are in an element.