Question

Define and illustrate pure substances.

Answer 1

Understanding the concept: Only one kind of particle, with a stable or unchanging structure, can form pure substances. These substances are further broken down into elements and compounds.

• Elements are substances that can't be broken down anymore. Example iron element.
• Even utilizing physical or chemical means, an element cannot be converted into a new element.
• Metals, nonmetals, and metalloids are commonly used.
• Compounds, on the other hand, are pure substances generated when two or more different elements are chemically mixed with a fixed ratio of their atoms. Example $H_{2}O$
• Compounds, on the other hand, can be broken down into separate elements using chemical methods.
• Examples Steel, Iron, Gold, Diamond, Water, Copper, and many more.

Characteristics of pure substances:-The pure substances have the following characteristics and properties:

• They have only one type of atom or molecule and are often homogeneous. Example water molecule and Sodium element.
• They have a consistent composition all the way through.
• These components have a fixed melting and boiling point.
• The production of predictable products is always the result of pure substances participating in chemical processes.