In chemistry, a chemical substance is a form of matter that has constant chemical composition and characteristic properties. It cannot be separated into components by physical separation methods, i.e. without breaking chemical bonds. It can be solid, liquid, gas, or plasma. Chemical substances are often called 'pure' to set them apart from mixtures.
All stories in Chemical substance
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How mimicking asteroid collisions can make diamonds in minutes
In nature, diamonds form deep in the Earth over billions of years. This process requires environments with exceptionally ...
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Alien oceans are home to some unusual chemistry
Exoplanets rich with water appear to be common around other stars. A new study examines conditions at the bottom of these ...
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Chemical recycling could be the solution to plastic pollution
The world is drowning in plastic. About 60% of the more than 8,700 million metric tonnes of plastic ever made is no longer ...
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Scientists are working on new ways to recycle chemicals from electronic waste
Our connected consumer society generates a lot of electronic waste, around 50 million tonnes per year worldwide. It is even ...
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How to train your brain to release more happy chemicals
Do you ever wish you could just turn on the happy chemicals in your brain? Imagine how much easier it would make getting ...
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Fear of ‘chemicals’ is stunting our scientific progress
During casual conversations with Uber drivers and new acquaintances on flights across the country, it sometimes comes up ...
