mol.

"Important types of property include real property (land), personal property (other physical possessions), and intellectual property (rights over artistic creations, inventions, etc.)."

"The prisoners were kept in a secure compound. "

"A small group."

"Hydrogen is the simplest chemical element, with only one proton in its atom. "

"The project consists of three main parts. "

"The scientist studied the tiny particle of dust. "

"The specific of her success was her dedication to studying. "

"The teacher's lesson plan was together, covering all the key concepts logically. "

"Oxygen is a diatomic molecule, meaning it's always found in pairs of atoms. "

"The doctor recommended that Maria increase her intake of potassium chloride to help balance her electrolytes. "

"The scientist studied the chemical composition of the soil sample. "

"Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom and a chlorine atom."