Your class' curiosity will peak during this video about the process of spectrometry. Young chemists discover how spectrometry assists forensic chemists in determining the identity of unknown substances, as well as how it played a role in...

Humans ingest approximately 1-5 mg of strontium everyday! An interesting video describes how scientists use the element strontium to learn about people. The narrator explains  where strontium is found and how it gets into and builds...

Have you ever wondered why the atomic mass listed on the periodic table isn't a whole number? This video explains how weighted averages are calculated and relates the average to the relative atomic mass. Viewers are then given an element...

After discovering plutonium, Glenn Seaborg was given the opportunity to determine its periodic symbol. Rather than going with the obvious Pl, he went with Pu as a joke. The designation was approved and is now on every periodic...

Einstein didn't just discover relativity, he proved the existence of atoms in 1905 — more than 110 years ago. Discover how he did it and begin learning about basic chemistry: parts of an atom, atomic mass, atomic number, and how to read...

Moles exist in chemistry? These are not animals that live underground and dig through your gardens — they are quantities of elements. Learn about moles and how they help chemists determine amounts of substances (from atomic mass to grams).

The amount of information you can learn about an element from the periodic table is amazing! Young scientists learn how to interpret the atomic number and atomic mass. Using a carbon atom as an example, the instructor describes the...

Altering the subatomic nature of an atom affects its properties. The video illustrates the idea of an isotope using Carbon-12, Carbon-13, and Carbon-14 as examples. 

Review carbon-12 with the final video in a 15-part series. The video first shows how to use mass spectrum results to determine the molar mass of carbon. It then determines the number of protons, neutrons, and electrons in carbon-12.

Did you know that body armor actually contains uranium? Learn about how isotopes of the same element have different masses and unique physical properties.

I so hope you'll learn about isotopes. Watch a video to understand that isotopes of an element have the same number of protons but different numbers of neutrons. Then solidify the knowledge by examining examples of hydrogen,...

Not all radiation is hazardous. Electromagnetic radiation is pure energy. Nuclear radiation comes from the atomic nucleus in which isotopes become unstable and radioactive. Share this video with your class to explore the types of...

Consisting entirely of photos and simple graphics, this fundamental video is an informative presentation. Topics include elements, molecules, chemical bonds, atomic mass, isotopes, and ionization. Because it covers a wide range, it would...

Check your understanding of how to use the atomic number and the mass number to represent different isotopes. [9:43]

In this video segment adapted from NOVA, scientists search for carbonized remains of plants preserved in lava flows to find out how long it has taken rain forests on Hawaii to regenerate after a volcanic eruption.

Socratic is a website where students ask questions and the community teaches them the answer. Every answer becomes a resource for countless students in the future. With this link, students get excellent video instruction on isotope...

This tutorial will go through the algebra and reasoning to figure out the amount of abundances of the isotopes, in percentages and in decimals.

In this episode, Hank welcomes you to the new age, where he talks about transmutation among elements, isotopes, calculating half-life, radioactive decay, and spontaneous fission. [9:58]

Watch this tutorial to answer the following questions: What is a weighted average? How do you calculate a weighed average? Weighted averages are used for atomic mass and atomic weight, based on the mass numbers of various isotopes.

It's time for our second to final Physics episode. So, let's talk Einstein and Nuclear Physics. What does E=MC2 actually mean? Why is it so useful to us as physicists and humans? In this video episode of Crash Course Physics, Shini sits...

How to use the atomic number and the mass number to represent different isotopes. [9:44]

A video showing an example of how to use the atomic mass and percent abundance of the carbon isotopes to calculate atomic weight. [4:26]

Take a historical perspective on the creation of the science, which didn't really exist until a super-smart, super-wealthy Frenchman put the puzzle pieces together. Hank tells the story of how we went from alchemists to chemists, who...

This lesson will present the basic properties and characteristics of elements. It is 4 of 4 in the series titled "Characteristics of Elements."