Úvod
50. ročník medzinárodnej chemickej olympiády
International Chemistry Olympiad (IChO), Medzinárodná chemická olympiáda, je spoločným vyvrcholením stredoškolských chemických súťaží z celého sveta, v ktorej si každoročne zmerajú sily stovky najúspešnejších riešiteľov.
Definícia SI jednotky látkového množstva - ZNOVU A DEFINITÍVNE
A new definition of the mole has arrived
https://iupac.org/new-definition-mole-arrived/ , 8 January 2018
IUPAC is recommending a new definition of the mole based on a specified number of elementary entities [Roberto Marquardt, Juris Meija, Zoltán Mester, Marcy Towns, Ron Weir, Richard Davis and Jürgen Stohner, “Definition of the mole (IUPAC Recommendation 2017)”, Pure Appl. Chem. 90(1), pp. 175-180 (2018), https://doi.org/10.1515/pac-2017-0106]:
The mole, symbol mol, is the SI unit of amount of substance. One mole contains exactly 6.022 140 76 × 1023 elementary entities. This number is the fixed numerical value of the Avogadro constant, NA, when expressed in mol−1, and is called the Avogadro number.
After an extensive consultation with the chemistry community, and following a review and critical evaluation of the literature the new definition comes in advance of the anticipated revision of the International System of Units (SI).
The new SI will be linking all seven base units to fundamental physical constants.Revised definitions of the kilogram, ampere, kelvin and mole are expected to come into force on World Metrology Day, 20 May 2019.
Z tlačovej správy IUPAC pre vás vybral Milan Drábik, predseda SNK IUPAC.
Periodickú tabuľku a jej výročie oslávime jej Medzinárodným rokom
NOVINKA
Informácie o aktuálne pripravovaných celosvetových aktivitách, ktoré sú dostupné na web stránke IUPAC, budú postupne prenášané aj na stránku SCHS/SNK IUPAC.
Našim cieľom je umožniť takto záujemcom spomedzi chemikov na Slovensku aktívne sa zapojiť do celosvetových aktivít k 150. výročiu objavu periodického zákona a periodickej tabuľky a súčasne k 100. výročiu založenia IUPAC.
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Tu prinášame prvé dve takéto informácie a možnosti:
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IUPAC100 PERIODIC TABLE CHALLENGE https://iupac.org/100/pt-challenge/, pričom dostupný je aj formulár na navrhovanie otázok do kvízu:
https://www.cognitoforms.com/IUPAC1/IUPAC100PERIODICTABLECHALLENGE
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Periodic Table of Younger Chemists (kolegovia/kolegyne mladší ako 40 rokov) https://iupac.org/100/pt-of-chemist/ , aj s nominačným formulárom - https://iupac.org/100/nominate-young-chemist/
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The United Nations Proclaims the International Year of the Periodic Table of Chemical Elements
https://iupac.org/united-nations-proclaims-international-year-periodic-table-chemical-elements/ , 28 December 2017
On 20 December 2017, during its 74th Plenary Meeting, the United Nations (UN) General Assembly 72nd Session has proclaimed 2019 as the International Year of the Periodic Table of Chemical Elements (IYPT 2019).
The development of the Periodic Table of the Elements is one of the most significant achievements in science and a uniting scientific concept, with broad implications in Astronomy, Chemistry, Physics, Biology and other natural sciences. Particular areas where the Periodic Table and its understanding have had a revolutionary impact are in nuclear medicine, the study of chemical elements and compounds in space and the prediction of novel materials.
The International Year of the Periodic Table of Chemical Elements in 2019 will coincide with the 150th anniversary of the discovery of the Periodic System by Dmitry Mendeleev in 1869, and also with the Centenary of IUPAC (IUPAC100). The events of IUPAC100 and of IYPT will enhance the understanding and appreciation of the Periodic Table and chemistry in general among the public.
Z tlačovej správy IUPAC pre vás vybral Milan Drábik, predseda SNK IUPAC.
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