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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.
The National Standard Examination in Chemistry or NSEC is an examination in chemistry for higher secondary school students in India, usually conducted in the end of November. [1] The examination is organized by the Indian Association of Chemistry Teachers. Over 30,000 students, mainly from Standard 12, sit for this examination.
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.
Also acid ionization constant or acidity constant. A quantitative measure of the strength of an acid in solution expressed as an equilibrium constant for a chemical dissociation reaction in the context of acid-base reactions. It is often given as its base-10 cologarithm, p K a. acid–base extraction A chemical reaction in which chemical species are separated from other acids and bases. acid ...
Nickel has two atomic electron configurations, [Ar] 3d 8 4s 2 and [Ar] 3d 9 4s 1, which are very close in energy; [Ar] denotes the complete argon core structure. There is some disagreement on which configuration has the lower energy. [23] Chemistry textbooks quote nickel's electron configuration as [Ar] 4s 2 3d 8, [24] also written [Ar] 3d 8 4s ...
Freshers is an Indian Marathi television series directed by Aniruddh Shinde and it was aired from 22 August 2016 on Zee Yuva. [1] It was ended on 13 June 2017. [2] This series is based on friendship and lifestyle of first year B. M. M. degree college students admitted in H. K. College in Mumbai.
Freshman class artwork, from East Texas State Normal College's 1920 Locust yearbook. A freshman, fresher, first year, or colloquially frosh, [1] is a person in the first year at an educational institution, usually a secondary school or at the college and university level, but also in other forms of post-secondary educational institutions.
Sims is a National Geographic explorer well known for using his technical mountaineering skills to collect geological samples from remote locations across the globe, including sampling molten magma from lava lakes deep within volcanic craters, collecting temporal sequences of lavas from high, technical ridges on the flanks of the world's tallest volcanoes, and using submersibles to obtain mid ...