solid and liquid
Solids
Yes.
Gases
Covalent compounds can be solids, liquids or gases.
Light travels in the air phase of matter compared to the liquids and solids.
A solution is a homogeneous mixture of two or more liquids, only one phase. When another phase exist (for example solids, immiscible liquids) this is not a true solution.
Solids become liquids. A phase change.
They are all something in something else. Suspensions are colloids. Colloids are something small dispersed in something else - solids in liquids (a suspension), gases in liquids, gases in solids etc etc Solutions are one phase - a liquid, but at least 2 compounds make up that phase.
Solids to Liquids (Melting) Liquids turning back into a Solid (Freezing) ((SCF))
They are all something in something else. Suspensions are colloids. Colloids are something small dispersed in something else - solids in liquids (a suspension), gases in liquids, gases in solids etc etc Solutions are one phase - a liquid, but at least 2 compounds make up that phase.
solids and liquids
The vapour pressure of solids are far less than those of liquid because solids have fixed arrangement of molecules and between atom of solids their is strong intermolecular forces that held the molecules in place and the molecules of liquid have less intermolecular forces as compared to solids.