Question
What is a pure substance
Answers
GPT-4o mini
A pure substance is a material that has a consistent and uniform composition throughout. It contains only one type of particle, which can be atoms, molecules, or compounds. Pure substances can be classified into two main categories:
1. **Elements**: These are pure substances that consist of only one kind of atom. Examples include hydrogen (H), oxygen (O), gold (Au), and iron (Fe).
2. **Compounds**: These are pure substances formed when two or more different elements are chemically bonded together in a fixed ratio. Examples include water (H₂O), carbon dioxide (CO₂), and sodium chloride (NaCl).
In contrast, mixtures consist of two or more substances that are not chemically combined and can often be separated by physical means. Pure substances have distinct physical and chemical properties, such as melting and boiling points, which do not change regardless of the amount present.
1. **Elements**: These are pure substances that consist of only one kind of atom. Examples include hydrogen (H), oxygen (O), gold (Au), and iron (Fe).
2. **Compounds**: These are pure substances formed when two or more different elements are chemically bonded together in a fixed ratio. Examples include water (H₂O), carbon dioxide (CO₂), and sodium chloride (NaCl).
In contrast, mixtures consist of two or more substances that are not chemically combined and can often be separated by physical means. Pure substances have distinct physical and chemical properties, such as melting and boiling points, which do not change regardless of the amount present.