Describe each of the following as a physical or chemical...

Describe each of the following as a physical or chemical property: a. Chromium is a steel-gray solid. b. Hydrogen reacts readily with oxygen. c. A patient has a temperature of $40.2^{\circ} \mathrm{C}$ d. Milk will sour when left in a warm room. e. Butane gas in an igniter burns in oxygen.

Describe each of the following as a physical or chemical property:
a. Chromium is a steel-gray solid.
b. Hydrogen reacts readily with oxygen.
c. A patient has a temperature of $40.2^{\circ} \mathrm{C}$
d. Milk will sour when left in a warm room.
e. Butane gas in an igniter burns in oxygen.

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Key Concepts

Physical Properties

Physical properties are characteristics that can be observed or measured without altering the chemical composition of a substance. This includes attributes such as color, density, melting point, boiling point, and phase. These properties are useful for identifying materials and can be determined by simple measurements or observations.

Chemical Properties

Chemical properties describe a substance’s potential to undergo chemical changes that transform it into different substances. These properties involve reactions with other chemicals, which may result in the formation of new compounds, energy changes, or color changes. They cannot be determined by mere observation and require a chemical reaction to be demonstrated.

Chemical Reactions

Chemical reactions are processes in which substances interact and break chemical bonds to form new substances with different chemical identities and properties. These reactions illustrate the chemical properties of a substance, particularly its reactivity, and are key to understanding how materials interact under various conditions.

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