Nuclear notation


Nuclear notation

Nuclear notation is a common notation used in chemistry and physics to indicate the atomic number and mass number of an isotope.

Nuclear notation is formed by writing an elemental symbol preceded by a subscript indicating its atomic number (number of protons) and a superscript indicating its mass number (number of nucleons). For example, carbon-12 has an atomic number of 6 and a mass number of 12 and would thus be written as 12
6
C
. If the isotope is in a metastable state, an "m" can be added to the mass number. For example technetium-99m can be written as 99m
43
Tc
.

It is also common to drop the atomic number, as it is redundant with the symbol 12
C
, 99m
Tc
.



Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Notation — The term notation can refer to: Contents 1 Written communication 1.1 Biology and Medicine 1.2 Chemistry 1.3 Dance and movement …   Wikipedia

  • Nuclear reaction — In nuclear physics and nuclear chemistry, a nuclear reaction is semantically considered to be the process in which two nuclei, or else a nucleus of an atom and a subatomic particle (such as a proton, or high energy electron) from outside the atom …   Wikipedia

  • nuclear fusion — fusion (def. 4). [1895 1900] * * * Process by which nuclear reactions between light elements form heavier ones, releasing huge amounts of energy. In 1939 Hans Bethe suggested that the energy output of the sun and other stars is a result of fusion …   Universalium

  • Nuclear cross section — The nuclear cross section of a nucleus is used to characterize the probability that a nuclear reaction will occur. The concept of a nuclear cross section can be quantified physically in terms of characteristic area where a larger area means a… …   Wikipedia

  • Parts-per notation — One part per trillion (1 ppt) is a proportion equivalent to one twentieth of a drop of water diluted into an Olympic size swimming pool. In science and engineering, the parts per notation is a set of pseudo units to describe small values of… …   Wikipedia

  • Chemical formula — Al2(SO4)3 Example of a chemical formula, aluminium sulfate A chemical formula or molecular formula is a way of expressing information about the atoms that constitute a particular chemical compound. The chemical formula identifies each constituent …   Wikipedia

  • Chemical symbol — A chemical symbol is a 1 or 2 letter internationally agreed code for a chemical element, usually derived from the name of the element, often in Latin. Only the first letter is capitalised. For example, He is the symbol for helium (English name,… …   Wikipedia

  • Noble gas — Group 18 Period 1 2 He 2 …   Wikipedia

  • analysis — /euh nal euh sis/, n., pl. analyses / seez /. 1. the separating of any material or abstract entity into its constituent elements (opposed to synthesis). 2. this process as a method of studying the nature of something or of determining its… …   Universalium

  • atom — /at euhm/, n. 1. Physics. a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical… …   Universalium


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.