Flammability: This refers to how easily a substance catches fire and burns. Examples:
* Wood is flammable, while water is not.
* Gasoline is highly flammable, while steel is not.
Reactivity: This describes how readily a substance undergoes chemical reactions. Examples:
* Sodium reacts violently with water, while gold is very unreactive.
* Iron rusts in the presence of oxygen and water, while platinum does not.
Acidity/Alkalinity (pH): This measures the concentration of hydrogen ions in a solution. Examples:
* Lemons are acidic, while baking soda is alkaline.
* Stomach acid is highly acidic, while blood is slightly alkaline.
Oxidation: This refers to the process of a substance losing electrons, often resulting in the formation of oxides. Examples:
* Iron oxidizes to form rust.
* Fruits brown when exposed to air due to oxidation reactions.
Decomposition: This refers to the breakdown of a substance into simpler components. Examples:
* Sugar can decompose into carbon and water when heated.
* Food spoils due to decomposition caused by bacteria and enzymes.
Combustibility: This describes the ability of a substance to burn in the presence of oxygen. Examples:
* Paper is combustible, while rock is not.
* Methane is a highly combustible gas, while nitrogen is not.
Corrosion: This refers to the gradual deterioration of a material due to chemical reactions with its environment. Examples:
* Copper corrodes to form a green patina.
* Aluminum corrodes to form a protective oxide layer.
Stability: This refers to the tendency of a substance to resist chemical change. Examples:
* Diamond is very stable and resists chemical attack.
* Explosives are unstable and readily decompose, releasing energy.
Chemical Properties vs. Physical Properties
It's important to distinguish between chemical and physical properties. Chemical properties change the composition of a substance, while physical properties can be observed without altering the substance's chemical makeup. Examples of physical properties include:
* Color
* Density
* Melting point
* Boiling point
* Solubility
Let me know if you'd like more examples of specific chemical properties!
