Chemistry

Chemistry is the science of matter and the changes it undergoes during chemical reactions. In this section, learn about everyday chemistry, from chlorine beach to helium, and even why chocolate turns gray.

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Award-winning poet and fiction writer Mary Soon Lee has found a charming way to combine science and poetry in a refreshing new take on the periodic table of elements.

By Carrie Tatro

Borax, a popular addition to laundry detergents and slime recipes, is a natural ingredient that has been getting flack for possibly being harmful to children. But is this true?

By Alia Hoyt

If you've ever had a half-frozen beer explode on you, you know that yes, alcohol freezes — but not all types freeze at the same rate. We'll let you in on the secrets to frozen alcoholic delights.

By Alison Cooper

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It’s the ultimate cheat sheet for science class — and it’s right there hanging on the wall. What do you really know about the indispensable periodic table of elements?

By Nathan Chandler

The story of how the first new blue pigment in 200 years was discovered and took its place in the crayon box.

By Loraine Fick

Why do most of us start relaxing as soon as we smell lavender or vanilla? Is it the memories they conjure up or is there a chemical reason?

By Dave Roos

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You probably have a bottle of the stuff at your house. Have you ever seen it come in any color bottle besides brown?

By John Perritano

The Trump administration quietly changed the rules on asbestos use in the U.S. What does that mean?

By John Donovan

Scientists have developed a blood test that can give an approximate age of a person within an hour.

By Alia Hoyt

It's a force of habit to shake spray canisters, but when it comes to canned air, that inclination could cause frostbite.

By Laurie L. Dove

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There's some serious science behind the sparkle, with different metals, compounds and other elements creating the fun firework.

By Christopher Hassiotis

YouTube channel Let's Melt This has become an internet sensation. Why are we so mesmerized by videos of everyday objects undergoing phase change?

By Christopher Hassiotis

A molecule used to protect the chlorine in swimming pools from sunlight could be key to building new kind of DNA structures

By Patrick J. Kiger

Developed in Israel, this foul-smelling liquid has been used on Palestinian and Israeli protesters … and it's showing up in the United States.

By Sarah Gleim

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At the same time scientists discovered that nitrous oxide could numb agonizing pain, they also found it could make you really lightheaded and silly. Yes, huffing parties started in the 1700s.

By Dave Roos

These small molecules are the foundation for much bigger things, from ordinary household products around us to essential components within our bodies.

By Debbie Swanson

Polymers are the basic components in so many of the products we use each day.

By Debbie Swanson

Juice and soda mix well with alcohol, but a few things don't mix so well. Some may just produce embarrassing moments. Others could cost you your life.

By Beth Brindle

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Imagine taking a substance that turns your skin green and scaly, then rots your flesh. It's not sci-fi. It's the reality of injecting krokodil, also known as the "flesh-eating zombie drug."

By Patrick J. Kiger

For a time, this designer drug was legal and available. And then ERs across the U.S. recorded 23,000 visits associated with bath salts in 2011, and the U.S. banned them and other synthetic drugs in 2012. What's the scoop on this relative newcomer?

By Nicholas Gerbis

The list of superstar athletes accused of — and admitting to — taking performance-enhancing drugs is almost as impressive as the number of sports that they compete in. And we're not just talking about steroids.

By William Harris & Jennifer Walker-Journey

Compounding pharmacies don't usually get a lot of media coverage for good news. It's the mistakes that tend to make the evening news. It turns out that U.S. regulatory practices for compounding pharmacies tend to follow much the same pattern.

By Kate Kershner

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If a drugstore is the equivalent of a 7-Eleven where you can pick up ready-made apple pie pockets, then a compounding pharmacy is your corner bakery where an individual tart is made just for you. But are these specialized pharmacies safe?

By Kate Kershner

That's one seriously big number, and technically Amedeo Avogadro didn't even come up with it. So how did the Italian chemist make such an indelible (numerical) mark on the wonderful world of chemistry?

By Jonathan Atteberry