Compounds are formed by the combination of atoms of two or more different elements in a fixed ratio to each other. Therefore, Cl3 not a compound. Hence, option D is the correct answer.
Matter can be divided into two categories. Elements and compounds. An element contains particles of only one type which may be atoms or molecules. The compounds contain particles of two or more elements. Some main characteristics of compounds are,
• Homogenous
• Definite melting and boiling points
• Combines in a fixed ratio
• Pure substance
Hence, we can conclude, compounds contain two or more different elements. Therefore, option D is the correct answer.
Learn more about compounds here:
https://brainly.in/question/9930309
