Compound — যৌগ

Definition

A compound is a pure substance in which two or more elements are chemically bonded in a fixed ratio, forming particles of one new kind — molecules or ionic units. Water ($\mathrm{H_{2}O}$) is always hydrogen and oxygen in 2:1 count; common salt ($\mathrm{NaCl}$) is always sodium and chlorine 1:1. A compound can be broken apart only by chemical change, and its properties are its own, unlike the elements inside: soft sodium and yellow-green chlorine gas make harmless table salt.

For example

The water in a coconut is the compound $\mathrm{H_{2}O}$, whether from Dhaka or Khulna; rust is the compound iron(III) oxide, always iron and oxygen in the same fixed recipe.

Elements this touches

Related terms