Elements: Sodium (a), Silver (d), Tin (f), Silicon (g)
Compounds: Calcium carbonate (e), Methane (k), Carbon dioxide
Mixtures: Soil (b), Sugar solution (c), Coal (h), Air (i), Soap (j), Blood (m)
Explanation:
Elements:
An element is a substance that cannot be broken down into simpler substances by chemical means. Sodium, silver, tin, and silicon are all considered elements.
Compounds:
A compound is formed when two or more elements are chemically combined in a fixed proportion. Calcium carbonate (CaCO3), methane (CH4), and carbon dioxide (CO2) are all compounds.
Mixtures:
A mixture is a combination of two or more substances that are not chemically combined. Soil, sugar solution, coal, air, soap, and blood are all considered mixtures.