I need help classifying these as physical and chemical properties!

1. sodium metal in chlorine gas releases luster.
2. sodium metal has a metallic silver luster.
3. sodium metal in water porduces hydrogen gas.
4. sodium metal melts to a liquid at 98 degrees.
5. sodium metal and oxygen form sodium oxide.
6. sodium metal conducts heat and electricty.

To classify these statements as physical or chemical properties, we need to understand the difference between the two.

Physical properties describe the characteristics of a substance that can be observed or measured without changing the identity of the substance. Examples of physical properties include color, density, melting point, boiling point, conductivity, and luster.

Chemical properties, on the other hand, describe how a substance undergoes a change in composition when reacting with other substances. Examples of chemical properties include reactivity, flammability, acidity, and ability to oxidize or reduce.

Let's classify each statement:

1. Sodium metal in chlorine gas releases luster.
This statement describes a chemical property because it indicates the reaction between sodium metal and chlorine gas, resulting in the release of luster or shine.

2. Sodium metal has a metallic silver luster.
This statement describes a physical property because it merely describes the appearance or characteristic shine of sodium metal.

3. Sodium metal in water produces hydrogen gas.
This statement describes a chemical property as it indicates the reaction between sodium metal and water, leading to the production of hydrogen gas.

4. Sodium metal melts to a liquid at 98 degrees.
This statement describes a physical property since it specifies the temperature at which sodium metal changes from a solid to a liquid state.

5. Sodium metal and oxygen form sodium oxide.
This statement describes a chemical property because it describes the reaction between sodium metal and oxygen, resulting in the formation of sodium oxide.

6. Sodium metal conducts heat and electricity.
This statement describes a physical property because it refers to the ability of sodium metal to conduct both heat and electricity.

Remember, when classifying properties, it's important to consider whether the property involves a change in the composition of the substance (chemical property) or if it describes an observable characteristic without a change in composition (physical property).