Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom. Iron is an ...

What's the difference between a compound and a mixture? What is the difference between a compound and a mixture? Understand the differences and why mixtures are important.

Scientists have found the first case of an ionic crystal consisting of just one chemical element -- boron. This is the densest and hardest known phase of this element. The new phase turned out to be a ...