Who can explain covalent bond in chemistry

Why doesn't heat added to water make the tempature rise above 100c

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.

How can one make a supersaturated solution? (apex)