the substance is substance
The two types of matter that are pure substances are elements and compounds.
pure substances and mixtures
The main reason is simply one of dichotomy: either a substance is pure or it is not pure. If it is not pure then it consists of two (or more) substances which are chemically separate - a mixture.
the substance is substance
A mixture is a substance made up of two or more pure substances.
Matter can be divided into two categories: pure substances and mixtures. Pure substances are made up of only one type of atom or molecule, while mixtures contain two or more different substances physically combined.
A mixture contain two or more pure substances.
Pure salt, NaCL, is a chemical compound made from two elements. So yes it is a combination of two pure substances
The two classifications of pure substances are elements and compounds. Elements are made up of only one type of atom, while compounds are made up of two or more different types of atoms bonded together in a fixed ratio.
elements and compounds
elements and compounds (:
Matter can be divided into two categories: pure substances and mixtures. Pure substances are made up of only one type of atom or molecule, while mixtures are composed of two or more different substances that are physically combined.