What is an element?

What is a compound?

What is a mixture?

What is a solution?

What is a solute?

What is a solvent?

what is meant by the terms soluble and insoluble?

What is the term for the following expression
mass of pure salt divided by mass of rock salt

What is chromatography and how and why does it work?

What is filtration how and why does it work?

What is distillation and how and why does it work?

What is meant by evaporation and how and why does it work?

What is concentration?

What is melting point?

What is boiling point?

What is sublimation?