Although many narcotic drugs and medications have similar effects or characteristics, each substance is unique. Here are some common examples. From codeine to heroin, there are many narcotic ...

Pure and Mixed Substances: In the world of chemistry, substances are broadly classified into two fundamental categories: pure and mixed substances. Understanding these distinctions is crucial as they ...

While these are examples of common substances, the term “substance use” can be broadly defined and may vary from person to person. It’s also important to know that there is no one-size-fits-all ...

The word 'pure' is used in chemistry in a different way from its everyday meaning. For example, shops sell cartons labelled as 'pure' orange juice. The label means that the contents are just orange ...

All substances have properties. These describe how a substance looks and behaves. There are two types of properties: physical and chemical. Watch this video about how physical and chemical properties ...

In 1964, the U.S. surgeon general released a report on the health impacts of smoking, and it shaped the public and government's attitudes toward tobacco for years to come. On Thursday, another surgeon ...