Question

What are pure substances?

Answer 1

Pure substances

• A pure substance is made up of a single type of particle.
• Elements and compounds are subcategories of pure substances.

Elements

• A basic form of matter that cannot be broken down into simpler substances through a chemical reaction is defined as an element.
• Mostly all elements such as Gold$\left(\mathrm{Au}\right)$,Silver$\left(\mathrm{Ag}\right)$, copper$\left(\mathrm{Cu}\right)$,iron$\left(\mathrm{Fe}\right)$ are pure substances.

Compounds

• Compound is a pure substance made up of two or more elements combined chemically in a definite ratio.
• Compounds are pure substances.

Examples of compounds are Baking soda$\left({\mathrm{NaHCO}}_3\right)$, Ammonia$\left({\mathrm{NH}}_3\right)$.