Alpha Definition Chemistry 2020 ::

Chemistry. Glossary of chemistry terms. Meaning and definition of alpha a particle: a helium nucleus. 21.1 For the term alpha a particle may also exist other definitions and meanings, the meaning and definition indicated above are indicative not be used for medical and legal or special purposes. 11/12/2019 · Other articles where Alpha phase is discussed: titanium processing: Alpha and beta phases: The atoms of pure titanium align in the solid state in either a hexagonal close-packed crystalline structure, called the alpha α phase, or a body-centred cubic structure, called the beta β phase. In the pure metal, transformation from the.

The letter alpha represents various concepts in physics and chemistry, including alpha radiation, angular acceleration, alpha particles, alpha carbon and strength of electromagnetic interaction as Fine-structure constant. Alpha also stands for thermal expansion coefficient of a compound in physical chemistry. Alpha particles are helium nuclei and are produced by some radioactive substances known as 'alpha sources.' An alpha particle, just like a helium nuclei, contains two protons and two neutrons. You might, therefore, be inclined to just use the term 'helium nuclei,' and a lot of scientists would agree with you -- the name usually depends on context. Search the Dictionary for More Terms. Return to top of page. Copyright © 2017Chemistry Dictionary Tools Periodic Table Citing Chemicool About. Alpha/beta particles and gamma rays are the three most common forms of radiation emitted by unstable or radioactive isotopes. All three were named by a New Zealand-born physicist named Ernest Rutherford in the early part of the 20th century. All three kinds of radioactivity are potentially dangerous to.

Alpha particles are commonly emitted by all of the larger radioactive nuclei such as uranium, thorium, actinium, and radium, as well as the transuranic elements. Unlike other types of decay, alpha decay as a process must have a minimum-size atomic nucleus which can support it. Illustrated Glossary of Organic Chemistry. α-Amino acid alpha-amino acid: A molecule containing an amino group and a carboxylic acid group that are separated by one carbon, called the α-carbon. In biochemistry there are twenty standard amino. ‘She has built a reputation working with alpha architects.’ ‘He became the alpha student of the program.’ ‘Although there is no point where a formal line can be drawn, there is a subset of people with a disproportinate amount of links, traffic, and influence who are, by tradition called the alpha bloggers.’. Alpha hydroxy acid. Jump to navigation Jump to search. α-, β- and γ-hydroxy acids. α-Hydroxy acids, or alpha hydroxy acids AHAs, are a class of chemical compounds that consist of a carboxylic acid substituted with a hydroxyl group on the adjacent carbon. They may be naturally.

That same large size of alpha particles, however, makes them less able to penetrate matter. They collide with molecules very quickly when striking matter, add two electrons, and become a harmless helium atom. Alpha particles have the least penetration power and can be stopped by a thick sheet of paper or even a layer of clothes.

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