1. Color: The color of a substance is a physical property that can be observed without changing its chemical composition. For example, gold is yellow, silver is white, and copper is reddish-brown.
2. Odor: The odor of a substance is a physical property that can be detected by the sense of smell. For example, perfume has a pleasant odor, while rotten eggs have a foul odor.
3. Density: The density of a substance is a physical property that refers to its mass per unit volume. For example, lead is denser than aluminum, which means that lead has more mass for the same volume.
4. Melting point: The melting point of a substance is a physical property that refers to the temperature at which it changes from a solid to a liquid state. For example, water melts at 0 degrees Celsius, while iron melts at 1,538 degrees Celsius.
5. Boiling point: The boiling point of a substance is a physical property that refers to the temperature at which it changes from a liquid to a gas state. For example, water boils at 100 degrees Celsius, while ethanol boils at 78.3 degrees Celsius.
Chemical Properties:
1. Flammability: The flammability of a substance refers to its ability to burn or catch fire. For example, gasoline is flammable, while water is not.
2. Reactivity: The reactivity of a substance refers to its tendency to undergo chemical reactions. For example, sodium is highly reactive, while gold is relatively inert.
3. Oxidizing ability: An oxidizing agent is a substance that causes another substance to undergo oxidation, which is the loss of electrons. For example, oxygen is an oxidizing agent, while carbon monoxide is a reducing agent.
4. Reducing ability: A reducing agent is a substance that causes another substance to undergo reduction, which is the gain of electrons. For example, carbon monoxide is a reducing agent, while oxygen is an oxidizing agent.
5. pH: The pH of a substance is a measure of its acidity or basicity, and it ranges from 0 to 14. A pH of 0 indicates a highly acidic substance, 7 indicates a neutral substance, and 14 indicates a highly basic substance.
