States of Matter

The only non-metal that is a liquid at room temperature and normal pressure is a halogen called bromine.

A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio. Water (H2O) fits this definition.

Evaporation is the phase transition from liquid to gas that occurs at the surface of a liquid.

Melting is the phase transition where a substance changes from a solid state to a liquid state upon heating. Evaporation is liquid to gas, and sublimation is solid to gas.

Sublimation is the process where a substance transitions directly from a solid phase to a gas phase without passing through the liquid phase. Examples include dry ice and iodine.

Freezing is the phase change where a liquid turns into a solid. This occurs when the temperature of the liquid is lowered below its freezing point.

Dry ice is the solid form of carbon dioxide.

Sodium is a highly reactive alkali metal that reacts violently with water and oxygen in the air; therefore, it is stored in kerosene to prevent contact with these substances.

Water vapour is the gaseous state of water. It occurs when water evaporates or boils.

A molecule of Plaster of Paris contains two molecules of water of crystallisation. Plaster of Paris is known as calcium sulphate.

The phase transition from liquid to gas is called evaporation or vaporization. Boiling is a specific type of rapid evaporation occurring at the boiling point, but the general term is vaporization.

Liquids have a definite volume because their particles are close together, but they lack a definite shape because the particles can slide past one another, allowing the liquid to take the shape of its container.

It exists as Solid , Liquid and gases.

By definition

by definition