RAI meaning in Chemistry ?

Answer: What is Radioactive Iodine mean?

There are 37 known isotopes of iodine (53I) from 108I to 144I; all undergo radioactive decay except 127I, which is stable. Iodine is thus a monoisotopic element.

Its longest-lived radioactive isotope, 129I, has a half-life of 15.7 million years, which is far too short for it to exist as a primordial nuclide. Cosmogenic sources of 129I produce very tiny quantities of it that are too small to affect atomic weight measurements; iodine is thus also a mononuclidic element—one that is found in nature only as a single nuclide. Most 129I derived radioactivity on Earth is man-made, an unwanted long-lived byproduct of early nuclear tests and nuclear fission accidents.

All other iodine radioisotopes have half-lives less than 60 days, and four of these are used as tracers and therapeutic agents in medicine. These are 123I, 124I, 125I, and 131I. All industrial production of radioactive iodine isotopes involves these four useful radionuclides.

The isotope 135I has a half-life less than seven hours, which is too short to be used in biology. Unavoidable in situ production of this isotope is important in nuclear reactor control, as it decays to 135Xe, the most powerful known neutron absorber, and the nuclide responsible for the so-called iodine pit phenomenon.

In addition to commercial production, 131I (half-life 8 days) is one of the common radioactive fission-products of nuclear fission, and is thus produced inadvertently in very large amounts inside nuclear reactors. Due to its volatility, short half-life, and high abundance in fission products, 131I (along with the short-lived iodine isotope 132I from the longer-lived 132Te with a half-life of 3 days) is responsible for the largest part of radioactive contamination during the first week after accidental environmental contamination from the radioactive waste from a nuclear power plant.

reference

Full Form	Category
Royal Archaeological Institute	Academic & Science
Real Academia de Ingeniería	Academic & Science
Academia de Ingeniería de España	Academic & Science
Academy of Engineering of Spain	Academic & Science
Royal Anthropological Institute of Great Britain and Ireland	Academic & Science
Real Academia de Ingeniería	Academic & Science
Academia de Ingeniería de España	Academic & Science
Praia	Airport Code
Reynolds American Incorporated	Business
Restaurants Association of Ireland	Business
Resource Adapters, Incorporated	Business
Radio Audizioni Italiane	Business
Rijwiel Automobiel Industries	Business
Recapitalization Advisors, Incorporated	Business
Raisama Limited	Business
Radioactive Iodine	Chemistry
Retailers Association of India	Community
Radiotelevisione Italiana	Community
Royal Anthropological Institue	Community
Reference Author Index	Community
Reaching Arms International	Community
Radio Audizioni Italia	Community
Resident Assessment Instruments	Community
Remote Alarm Indication	Computer and Networking
Remote Assistance Initiation	Computing
Routing Area Identity	Computing
Resource Availability Indication	Computing
Rapid Application Integration	Computing
HAKURAI	Cryptocurrency
Rai Reflex Index	Cryptocurrency
Royalty Administration International	General
Regent Admission Index	General
Resources Activities and Items	General
Responsible agricultural investments	General
Redundant Array of Inexpensive	General
Rijwiel and Automobiel Industrie	General
Rudder Angle Indicator	General
Roberts Ackley Improved	General
Reliability Assurance Initiative	General
Runway Alignment Indicator	General
Los Angeles Raiders	General
Rotary Authorized Installers	General
Rural Access Indicator	General
Rapid Acquisition Indication	General
Ram Air Intake	General
Robotic Agent Interface	General
Reglaje Automatico Integrado	General
Rijwiel en Automobiel Industrie	General
Road Asset Improvement	General
Rothermere American Institute	Governmental
RAIBHA	Indian Railway Station
Reynolds American International	International
Rampart Against Infection	Medical
Resident Assessment Instrument	Physics Related
Praia International Airport, Praia, Cape Verde Islands	Regional
Royal Anthropological Institute	Regional
Rss Abstraction Interface	Softwares
Radar Altimeter Indicator	Space Science
Roll Attitude Indicator	Space Science