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
-
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 ...
