Pure substances are the presence of compounds of the elements. These are the types of substances that are made with one entity. Pure substances are the parts that can not get broken by physical methods, like CO2 or Diamond.
Compounds
The term compounds are the presence of pure substances that are made with more than two elements with a definite ratio.
Features
The compound properties are very different from constituents.
The substance compounds have a fixed melting point.
The compound is from a homogeneous substance.
The compound comprises more than two elements in a mixed ratio.
Types
The mixture is of two different types. These types are discussed here.
Homogeneous
A homogeneous mixture is one type of mixture that is uniform.
e.g.: Salt in water, sugar in water.
Heterogeneous
The mixture consists of different parts.
e.g.: Iron filings, sand, and sugar.
Alloys
The component alloys are combinations of metals,i.e., homogeneous. Or it is a combination of metal or one more component that can not be isolated into their parts by actual strategies.
Models
Steel, a mix of iron , i.e., metal & carbon ,i.e., non-metal.
Metal is a combination of copper & zinc metal.
Learning Videos for 9th Grade Science - Is Matter Around Us Pure