Chemistry

Every moment of every day, chemistry plays a part in all we experience. This branch of the Helium network humbly attempts to illuminate the vast array of chemical knowledge, making it accessible to all. Let our site inform, inspire, and awe you with chemical wonders.
By: Can Tran
At any fireworks show, you will notice the different colors of fireworks. To any curious person, you are wondering how the fireworks get their different colors. When making the explosive powder for the fireworks, it is similar to mixing gunpowder and/or medicine. By mixing in...
By: Dr. Bryan Katz
One topic in chemistry that many students find challenging is the relationship between acids, bases, and the pH scale. For the purposes of this article, the Arrhenius definition of acids and bases will apply. According to this definition, acids are any substance that gives off...
By: Blaise Pascal
Every aqueous (water-based) solution will have a pH that is acidic, basic, or perhaps neutral. pH is a measurement that is used to quantify aqueous solutions into a range of values known as the pH scale. If the solution is basic it will be higher...
Chemical elements that produce colors in fireworks
By: B.W. Harold
The science of pyrotechnics is a fascinating and wild ride. When the shell of a firework is created, it is a careful balance of chemistry and art. Like all arts it requires relentless study and artful design. So what makes these beautiful balls of fury...
By: May Monten
The Chemistry Olympiad is an international competition for high school students. Talented chemistry students compete at the local level, with winners moving on to national competitions. Four winners from each country go on to compete against teams from around the world.* HistoryThe International Chemistry...
By: Earl Roske
Despite the rumors out there, understanding acids, bases and pH is about as easy as, well, using a seesaw. Most people know what a seesaw is, right? A plank of wood balanced on a fulcrum, some pivoting point. A perfect seesaw is balanced, both sides...
By: Dr Pandula Siribaddana
When considering the efficiency of most electrical and mechanical appliances, it is evident that some portion of the energy utilized for their operation becomes wasted as heat. If such wasted energy can be utilized to produce electricity, it will not only help to save costs...
Applications of thermoelectric materials
By: Olivia Kay
Ever since thermoelectricity was first discovered in 1821, scientists have been working hard to further develop its principles and applications. When new discoveries are made, more ideas come from them, and more advancement occurs. Thermoelectricity revolves around the concept that when certain materials are heated...
By: Julie Thomas-Zucker
Skutterudites are hydrothermal ore crystals that contain nickel. These ores have important technological uses. They have thermoelectric properties that may replace cobalt applications in the future. Skutterudites occur in nature with erythrite. Because they have very low thermal conductivity, very high p-type mobility values, large...
Applications of thermoelectric materials
By: Jennifer Rempe
Thermoelectric materials could be a key to energy savings. These materials convert heat into electricity, or electricity into heat. A thermoelectric device creates a voltage when there is a difference in temperature on each side of the device, e.g. when one side is hot...

 

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