state two ways in which chemist used to describe matter with an example each
1. Physical properties: Chemists describe matter based on its physical properties, such as color, shape, size, density, and texture. For example, water is a colorless, odorless liquid with a density of 1 g/cm3 at room temperature.
2. Chemical properties: Chemists also describe matter based on its chemical properties, such as its reactivity with other substances, its ability to undergo a chemical change, and its composition. For example, sodium is a highly reactive metal that reacts violently with water to form sodium hydroxide and hydrogen gas.