Chemistry Facts

It's Crying Time Again

If you've ever spent any time in the kitchen, you know that slicing, chopping or dicing raw onions makes you cry. This vegetable has been doing this to humans for a long time. The onion is believed to ... Continue reading

What Is Reduction?

Long ago, in a laboratory far, far away...before the development of the atomic theory we now use, scientists believed in a principle called animism, and that the chemistry of different materials was ... Continue reading

Knocking the NOx Out of Coal

Nitrogen is the most common part of the air we breathe. In fact, about 80% of the air is nitrogen. Normally, nitrogen atoms float around joined to each other like chemical couples. But when air is ... Continue reading

Air is mostly nitrogen molecules (green in the above diagram) and oxygen molecules (purple). When heated hot enough (around 3000 degrees F), the molecules break apart and oxygen atoms link with the nitrogen atoms to form NOx, an air pollutant.

Why Does Cement Set?

Concrete has been known for literally thousands of years. It is a testament to the enduring strength of this material that concrete structures from those long-ago times are still standing strong ... Continue reading

Image of microstucture predicted from a NIST-developed model of cement hydration.

More Chemistry Facts

Atmospheric Chemistry:

Chemical Composition:

Liquid Glass Is All Wet

Chemical Properties:

Chemical Reactions:

Elements and Compounds:

Food:

Medicine:

Take Two And Call Me In The Morning

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