the scientific study of how substances (elements) are made up, how they combine, how they act under different conditions

arrangement, arranging

the careful way in which things are placed in relation to one another; a request to supply goods; a written instruction (especially to a bank or post office) to pay money, or giving authority

arrangement, organization

the act of organizing; an organized group of people (e.g. a business); organized system

arrangement, arranging

an official rule or order

managing, organizing