The physical properties of $D_2O$ differ from those of $H_2O$ because D is radioactive.

Are the physical and chemical properties of a compound necessarily similar to those of the elements from which it is composed?

What is the physical reason for the decrease of the chemical potential of a pure substance as the temperatures is raised?

Explain the physical origin of quantization for a particle confined to the interior of a one-dimensional box.

State the physical quantity corresponding to the following metric unit.

$$\mathrm{km} / \mathrm{h}$$

Contrast the general physical state at room temperature and room pressure for ionic and molecular compounds.

Classify each as a physical property or a chemical property. Sodium ignites when dropped in water.

Describe the similarities and differences between ionic compounds and metals in terms of their physical and chemical characteristics.

When water boils on the stove, does a chemical change or a physical change take place?

Indicate whether the following change in the physical state require heating or cooling.

Solid to liquid

Indicate whether the following change in the physical state require heating or cooling.

Gas to liquid

State the physical quantity corresponding to the following metric unit.

$$\mathrm{g} / \mathrm{mL}$$

Describe seven physical properties that help distinguish one mineral from another.

(a) What is a cline? _____ (b) What physical factors associated with altitude could affect plant phenotype? _____