It's time to check out Group 16 on the periodic table, the chalcogens. This includes oxygen, sulfur, selenium, tellurium, polonium, and livermorium. What can we say about their properties, reactivities, and applications? Let's find out!

Since arriving at Mars in 2012, NASA's Curiosity rover has drilled into rocks in search of organics - molecules containing carbon. Organics are the building blocks of all life on Earth, though they can also...

Practice REAL problems from actual past IIT/JEE exams with Professor Dave!

Practice REAL problems from actual past IIT/JEE exams with Professor Dave!

This is kentrophoros, a ciliate that James—our master of microscopes—had been searching for, receiving samples from all over the world in the hopes of finding it gliding around. When you first look at it, it doesn’t seem particularly...

Follow a science teacher as she gets expert advice on how to demonstrate spectacular reactions from Groups 1 and 7 of the Periodic Table safely and effectively. Starting with Group1 elements, Dr Kay Stephenson from the Royal Society of...

Solfege and Tonic Sol Fa. What is it, and how is it used? Many musicians use sol fa. Others have heard about it but are not sure how it works. In this music performance lesson, we explain the sol fa system and how it can transfer from...

Most of Earth's vital elements for life mostly likely came from a planetary collision that also created the moon more than 4.4 billion years ago.

While many scientists are hard at work on "green chemistry" projects that will benefit the environment, there are a handful of researchers at the University of Arizona who are starting a trend of their own - "yellow chemistry." That's...

This video provides an overview of the valuable and versatile element, silver. It explores its properties, uses in industries such as electronics and jewelry, its historical significance as a currency, and how it can be alloyed to...

Sulfur is the 16th element of the periodic table, and is a non-metal. In its elemental form it is a bright yellow crystalline solid at room temperature. In this video we are going to look at the basic physical and chemical properties of...

Learn about the composition and functioning of firecrackers. Black powder inside the cardboard tube ignites when the fuse is lit, causing a chain reaction that leads to an explosion, flash of light, and loud bang. This video also...

Learn the basics about manufacturing sulphuric acid as part of the equilibrium topic within reactions.

Detoxification of Cyanide by Thiosulfate Sulfotransferase: Physiology and Mechanism

Learn the basics about separating solutions, mixtures and emulsions when learning about separation techniques as a part of chemical tests. A solution is a mixture of two or more substances in the same phase. It is formed when a solute...

Doodle Science teaches you high school physics in a less boring way in almost no time!

Over the years, the Hubble Space Telescope has taken hundreds of images of different kinds of incredible nebulae in our universe.
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A nebula is a giant cloud of dust and gas in space. There are...

This video explains the properties and uses of sulfur, an element that has been known since ancient times. They discuss its yellow crystal and powder forms, its role in the production of sulfuric acid and fertilizers, its use in cleaning...

Learn the basics about Acid Rain. What causes acid rain? Find out more in this video!

This video demonstrates how to blend NIST middle distillate certified reference materials. It is intended to be used in conjunction with NIST Special Publication SP 260-167 available at href='http://ts.nist.gov/MeasurementService...'...

Learn the basics about reducing acid rain or its effects. How can we reducing acid rain and its effects? Find out more in this video!

Learn the basics about the principle of green chemistry that concerns catalysis, as a part of environmental chemistry. A catalyst increases the rate of a chemical reaction. This means that desired products can be made more quickly, using...

In this video, the concept of mass number is explained, using the example of sulfur. The video also introduces the idea of isotopes, using carbon as an example, and explains how the atomic mass is calculated as a weighted average of the...