The IUPAC / IUPAP Transfermium Working Group report in 1992 officially recognised the GSI team as discoverers of bohrium.

In 1992 the IUPAC / IUPAP Transfermium Working Group assessed the claims of the two groups and concluded that confidence in the discovery grew from results from both laboratories and the claim of discovery should be shared.

The term " geometric isomerism " is considered an obsolete synonym of " cis / trans isomerism " by IUPAC.

The IUPAC / IUPAP Transfermium Working Group ( TWG ) recognised the GSI collaboration as official discoverers in their 1992 report.

A more stable isotope (< sup > 231 </ sup > Pa ) of protactinium was discovered in 1917 / 18 by Otto Hahn and Lise Meitner, and they choose the name proto-actinium, but then the IUPAC named it finally protactinium in 1949 and confirmed Hahn and Meitner as discoverers.

In 1992, the IUPAC / IUPAP Transfermium Working Group ( TWG ) assessed the claims of discovery and concluded that both teams provided contemporaneous evidence to the synthesis of element 104 and that credit should be shared between the two groups.

The naming and credit for discovery of those elements remained unresolved for many years but eventually shared credit was recognized by IUPAC / IUPAP in 1992.

The IUPAC / IUPAP Joint Working Party ( JWP ) recognised the GSI team as discoverers in their 2001 report.

In 2001, the IUPAC / IUPAP Joint Working Party ( JWP ) concluded that there was insufficient evidence for the discovery at that time.

IUPAC / IUBMB now also recommends standard abbreviations for the following two amino acids:

Sequences are expected to be represented in the standard IUB / IUPAC amino acid and nucleic acid codes, with these exceptions: lower-case letters are accepted and are mapped into upper-case ; a single hyphen or dash can be used to represent a gap character ; and in amino acid sequences, U and * are acceptable letters ( see below ).

* At IUPAC standard temperature and pressure ( 0 ° C and 100 kPa ), dry air has a density of 1. 2754 kg / m < sup > 3 </ sup >.

The use of " molar " as a unit, equal to 1 mol / dm < sup > 3 </ sup >, symbol M, is frequent, but not ( as of May 2007 ) completely condoned by IUPAC: See if commonly used.

* 1959 / 1960: Unified atomic weight scale based on C = 12 adopted by IUPAP and IUPAC.

Since the early 1960s ferrocene has been gaining acceptance as the standard reference for nonaqueous work for a number of reasons, and in 1984, IUPAC recommended ferrocene ( II / III ) as a standard redox couple.

For non-aqueous work, IUPAC recommends the use of the ferrocene / ferrocenium couple as an internal standard.

General: Symbols for quantities should be chosen according to the international recommendations from ISO 80000, the IUPAP red book and the IUPAC green book.

This name was accepted by IUPAC on November 1, 2004 and approved by IUPAP on November 4, 2011.

Prior to 1959 both the IUPAP and IUPAC tended to use oxygen to define the mole, the chemists defining the mole as the number of atoms of oxygen which had mass 16 g, the physicists using a similar definition but with the oxygen-16 isotope only.

Unlike other CC's, its memebership is made up of nominees from other prominent national and international bodies such as International Organization for Standardization ( ISO ), National Institute of Standards and Technology ( NIST ), National Physical Laboratory ( NPL ), International Astronomical Union ( IAU ), International Union of Pure and Applied Chemistry ( IUPAC ) and International Union of Pure and Applied Physics ( IUPAP ).

In May 2009, the Joint Working Party ( JWP ) of IUPAC published a report on the discovery of copernicium in which they acknowledged the discovery of the isotope < sup > 283 </ sup > Cn.

In 1992, the IUPAC Trans-fermium Working Group ( TWG ) officially recognized the nuclear physics teams at Dubna and Berkeley as the co-discoverers of lawrencium.

In 1992, the IUPAC Trans-fermium Working Group officially recognized element 103, confirmed its naming as lawrencium, with symbol " Lr ", and named the nuclear physics teams at Dubna and Berkeley as the co-discoverers of lawrencium.

In the modern IUPAC nomenclature, the alkali metals comprise the group 1 elements, excluding hydrogen ( H ), which is nominally a group 1 element but not normally considered to be an alkali metal as it rarely exhibits behaviour comparable to that of the alkali metals.

For purposes of international communication and trade, the official names of the chemical elements both ancient and more recently recognized are decided by the International Union of Pure and Applied Chemistry ( IUPAC ), which has decided on a sort of international English language, drawing on traditional English names even when an element's chemical symbol is based on a Latin or other traditional word, for example adopting " gold " rather than " aurum " as the name for the 79th element ( Au ).

Attempting to resolve the issue, in 1994, the IUPAC proposed the name joliotium ( Jl ), after the French physicist Frédéric Joliot-Curie, which was originally proposed by Soviet team for element 102, later named nobelium.

In 1994 a committee of IUPAC recommended that element 108 be named hahnium ( Hn ), in spite of the long-standing convention to give the discoverer the right to suggest a name.

The most used standards are those of the International Union of Pure and Applied Chemistry ( IUPAC ) and the National Institute of Standards and Technology ( NIST ), although these are not universally accepted standards.

For example, IUPAC has, since 1982, defined standard reference conditions as being 0 ° C and 100 kPa ( 1 bar ), in contrast to their old standard of 0 ° C and 101. 325 kPa ( 1 atm ).< ref name =" IUPAC 2 ">

Structural isomerism, or constitutional isomerism ( per IUPAC ), is a form of isomerism in which molecules with the same molecular formula have bonded together in different orders, as opposed to stereoisomerism.

A vinyl compound ( formula − CH = CH < sub > 2 </ sub >) is any organic compound that contains a vinyl group ( Preferred IUPAC name ethenyl ),

A Group 6 element is one in the series of elements in group 6 ( IUPAC style ) in the periodic table, which consists of the transition metals chromium ( Cr ), molybdenum ( Mo ), tungsten ( W ), and seaborgium ( Sg ).

In 1979 IUPAC published recommendations according to which the element was to be called ununseptium ( with the corresponding symbol of Uus ), a systematic element name as a placeholder, until the discovery of the element is confirmed and a name is decided on.

Initially Dalén worked with acetylene ( IUPAC: ethyne ), an extremely explosive hydrocarbon gas.

3-Quinuclidinyl benzilate ( QNB, BZ, EA-2277 ), IUPAC name 1-azabicyclooct-3-yl 2-hydroxy-2, 2-diphenylacetate, is an odorless military incapacitating agent.

The boron group is the series of elements in group 13 ( IUPAC style ) of the periodic table, comprising boron ( B ), aluminium ( Al ), gallium ( Ga ), indium ( In ), thallium ( Tl ), and ununtrium ( Uut ).

Using IUPAC notation in which the brackets contain the natural variables ( other than the main four ), we have:

In the modern IUPAC nomenclature, Group 4 of the periodic table contains titanium ( Ti ), zirconium ( Zr ), hafnium ( Hf ) and rutherfordium ( Rf ).

In the modern IUPAC nomenclature, Group 5 of the periodic table contains vanadium ( V ), niobium ( Nb ), tantalum ( Ta ) and dubnium ( Db ).

In the IUPAC nomenclature, however, hexane is the unbranched isomer ( n-hexane ); the other four structures are named as methylated derivatives of pentane and butane.

In chemistry, however, it is conventional to use the IUPAC convention where the first law is formulated in terms of the work done on the system.

The term may refer to any of three structural isomers, or to a mixture of them: in the IUPAC nomenclature, however, pentane means exclusively the n-pentane isomer ; the other two being called " methylbutane " and " dimethylpropane ".

The IUPAC preferred notation however, with takes electrons into account and not atoms.

The term however has yet to be adopted by IUPAC.