A basic building block of matter. There are 118 chemical elements, 94 of which occur in nature. The additional 24 are created in labs. See rare earth elements and isotope. THIS DEFINITION IS FOR ...

A chemical change is more than just a simple alteration; it's a profound transformation at the molecular level. When substances undergo a chemical change, they undergo a metamorphosis, fundamentally ...

Understanding the differences between physical and chemical changes is the basics in the study of chemistry. These two types of transformations describe how substances can change in terms of their ...

Natural sources of six critical minerals are set to run out within the next 100 years, with several more under rising threat from increased use. Naturally occurring elements are critical to our daily ...

Catalysts that could recycle carbon dioxide into clean fuel. Compounds that could boost the power of batteries. Proteins that could transform how we treat disease. Every day, scientists hunt for new ...