Complete the statements by writing the number from the graph.
The substance is in the gas phase only in region
The substance is in both the liquid and the solid
phase in region
The substance is in only the liquid phase in region
The melting point is the temperature at region
The boiling point is the temperature at region

Answer :

The substance is in the gas phase only in region  → 5

The substance is in both the liquid and the solid  phase in region  → 2

The substance is in only the liquid phase in region  → 3

The melting point is the temperature at region  → 2

The boiling point is the temperature at region → 4

Explanation :

Six phases of substance:

Melting or fusion : In this process the phase changes from solid state to liquid state at constant temperature.Freezing : In this process the phase changes from liquid state to solid state at constant temperature.Evaporation : In this process the phase changes from liquid state to gaseous state at constant temperature.Condensation : In this process the phase changes from gaseous state to liquid state at constant temperature.Sublimation : In this process the phase changes from solid state to gaseous state without passing through the liquid state at constant temperature.Deposition : In this process the phase changes from gaseous state to solid state without passing through the liquid state at constant temperature.

Anions are negative charged ions

13) a 14) a15) b16) i don't know sorry17) a (maybe)