Article | REF: 25 V3

Periodic Classification of Elements

Author: Mireille DEFRANCESCHI

Publication date: May 10, 2013

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


Français

2. Quantities defining atoms and elements

2.1 Name and symbol

Most of these symbols have long since been adopted, except for recently-discovered unstable elements, for which IUPAC proposes a systematic nomenclature. This nomenclature is backed up by a 3-letter symbolism (one capital and two small letters). Each digit (from 0 to 9) of the atomic number units is assigned a letter (0 = N for Nil, 1 = U for Un...). Element 103 is thus assigned the symbol Unt and the name unniltrium, while the last known element (Z = 118) is given the name ununoctium, and its symbol is Uuo. In addition to the 3-letter symbol, elements from Z = 104 to 112 have been given names and thus chemical symbols, following a 2002 IUPAC recommendation to name new elements after "a mythological concept, a place, a country, a property or a scientist". These...

You do not have access to this resource.

Exclusive to subscribers. 97% yet to be discovered!

You do not have access to this resource.
Click here to request your free trial access!

Already subscribed? Log in!


The Ultimate Scientific and Technical Reference

A Comprehensive Knowledge Base, with over 1,200 authors and 100 scientific advisors
+ More than 10,000 articles and 1,000 how-to sheets, over 800 new or updated articles every year
From design to prototyping, right through to industrialization, the reference for securing the development of your industrial projects

This article is included in

Physics and chemistry

This offer includes:

Knowledge Base

Updated and enriched with articles validated by our scientific committees

Services

A set of exclusive tools to complement the resources

Practical Path

Operational and didactic, to guarantee the acquisition of transversal skills

Doc & Quiz

Interactive articles with quizzes, for constructive reading

Subscribe now!

Ongoing reading
Quantities defining atoms and elements