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A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.
Chemistry is the scientific study of the properties and behavior of matter. [1] It is a physical science within the natural sciences that studies the chemical elements that make up matter and compounds made of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during reactions with other substances.
Staffing is the process of finding the right worker with appropriate qualifications or experience and recruiting them to fill a job position or role. [ 1 ] [ 2 ] Through this process, organizations acquire, deploy, and retain a workforce of sufficient quantity and quality to create positive impacts on the organization's effectiveness. [ 3 ]
Secondary school is split into 2 parts (grades 9–10 and grades 11–12) with a standardised nationwide examination at the end of grade 10 and grade 12 (colloquially referred to as "board exams"). Grade 10 examination results can be used for admission into grades 11–12 at a secondary school, pre-university programme, or a vocational or ...
Analytical chemistry has been important since the early days of chemistry, providing methods for determining which elements and chemicals are present in the object in question. During this period, significant contributions to analytical chemistry included the development of systematic elemental analysis by Justus von Liebig and systematized ...
In 1913, the German chemist Max Bodenstein first put forth the idea of chemical chain reactions. If two molecules react, not only molecules of the final reaction products are formed, but also some unstable molecules which can further react with the parent molecules with a far larger probability than the initial reactants.
This includes agriculture manufacturing, construction, and service industries. [11] Major industrial customers include rubber and plastic products, textiles, apparel, petroleum refining, pulp and paper, and primary metals. Chemicals are nearly a $5 trillion global enterprise, and the EU and U.S. chemical companies are the world's largest ...