Question

What is meant by a substance?

Updated on May 31, 2025 | By Learnzy Admin | 👁️ Views: 366 students

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Solution

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A substance is a type of matter that has a uniform and definite composition. This means it is made up of only one kind of particle throughout. Substances can be either:

Elements – Made of only one type of atom (e.g., oxygen, copper).
Compounds – Made of two or more elements chemically combined in a fixed ratio (e.g., water, carbon dioxide).

Substances have consistent properties such as boiling point, melting point, and density. Unlike mixtures, their composition does not vary from sample to sample.

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