Learn about chemistry, the study of matter and its reactions. Find projects, study notes, periodic tables, and worked example problems.

Silicone is a polymer, like this blue cup. Silicon is a metalloid element. (Tatsuo Yamashita)
Silicon and silicone are two commonly confused terms. It’s understandable, since the only difference between the written words is the letter “e.” However, one is an element from the periodic table, while the other is a compound that contains that element. They aren’t the same, any more than saying carbon […]

What Is the Difference Between Silicon and Silicone?

The use of petrochemicals in medicine includes the manufacture of pills, capsules, and disposable syringes.
It’s hard to notice what’s going on around you when you’re injured or sick. You may be surprised at the key role played by petrochemicals in medicine. Some uses are obvious, like plastic tubes and containers. Most uses of petroleum are much harder to see. Petroleum products save doctors and […]

Petrochemicals in Medicine