Rn meaning in Chemistry ?

Answer:

What is Radon mean?

Radon is a chemical element with the symbol Rn and atomic number 86. It is a radioactive, colorless, odorless, tasteless noble gas. It occurs naturally in minute quantities as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead and various other short-lived radioactive elements. Radon itself is the immediate decay product of radium. Its most stable isotope, 222Rn, has a half-life of only 3.8 days, making it one of the rarest elements. Since thorium and uranium are two of the most common radioactive elements on Earth, while also having three isotopes with half-lives on the order of several billion years, radon will be present on Earth long into the future despite its short half-life. The decay of radon produces many other short-lived nuclides, known as radon daughters, ending at stable isotopes of lead.

Unlike all other intermediate elements in the aforementioned decay chains, radon is, under standard conditions, gaseous and easily inhaled, and therefore a health hazard. It is often the single largest contributor to an individual's background radiation dose, but due to local differences in geology, the level of exposure to radon gas differs from place to place. A common source is uranium-containing minerals in the ground, and therefore it accumulates in subterranean areas such as basements. Radon can also occur in some ground water like spring waters and hot springs.

Epidemiological studies have shown a clear link between breathing high concentrations of radon and incidence of lung cancer. Radon is a contaminant that affects indoor air quality worldwide. According to the United States Environmental Protection Agency (EPA), radon is the second most frequent cause of lung cancer, after cigarette smoking, causing 21,000 lung cancer deaths per year in the United States. About 2,900 of these deaths occur among people who have never smoked. While radon is the second most frequent cause of lung cancer, it is the number one cause among non-smokers, according to EPA policy-oriented estimates. Significant uncertainties exist for the health effects of low-dose exposures. Unlike the gaseous radon itself, radon daughters are solids and stick to surfaces, such as airborne dust particles, which can cause lung cancer if inhaled.

reference

Full Form	Category
Reflection Nebulosity	Academic & Science
Room Number	Academic & Science
Revisorsn	Accounts and Finance
Revisorsnämnden (Sweden)	Business
Rio Novo Gold Incorporated Ordinary Shares	Business
Radon	Chemistry
Residue Number	Chemistry
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Resident Net	Community
Red Neck	Community
Richard Nixon	Community
Randy Newman, singer and composer	Community
Read News	Community
Render Node	Computing
Randys Notation	Computing
Reference Name	Computing
Record Number	Database Management
Nota Bene Xpl Program	File Type
Really Naughty	General
Rio Negro	General
Rally Novice	General
Refreshments and Narcotics	General
Release Notes	General
Reference Noise	General
Rescue Ninja	General
RNA Answers	General
Registration Number	General
Raw Number	General
Registered Number	General
Real Nurses	General
Rich Nurse	General
Round To Nearest	General
Repaired Northridge	General
Renumbering N	General
Raving Num	General
Real Nurse	General
Really Nutty	Governmental
Registered Nut	Governmental
Respect No	Governmental
Renegade Nation	Governmental
Really Neurotic	Governmental
Routing Number	Governmental
Registered Numbers	Governmental
Route Nationale	International
Revenu National	International
Rimini (Provence)	International
Renovación Nacional	International
Right Now	Internet
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Result Number	Maths
Roman Numeral	Maths
Rule Name	Maths
Renumbering	Maths
Response Numerical	Maths
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Rockstar Nurse	Medical
Regestired Nurse	Medical
Raptor Nurse	Medical
Reject Nurses	Medical
Rattus Norvegicus	Medical
Remarkable Nurses	Medical
Radical Nephrectomy	Medical
radionuclide	Medical
ranitidine	Medical
Rebound Nystagmus	Medical
Red Nucleus	Medical
Reflux Nephropathy	Medical
Regenerative Nodule	Medical
Rehabilitation Nurse	Medical
Rheumatoid Nodule	Medical
Real Nice	Messaging
Real Nut	Messaging
Royal Navy	Military and Defence
Real Network	Networking
Regional Number	Regional
Kirundi: A language of Niger and Congo	Regional
Radius of Neptune	Space Science
Reynolds Number	Space Science
Real Nimrod	Sports