Encyclopedia - Acetic Acid: Encyclopedia - Acetic Acid
Acetic acid, also known as ethanoic acid, is an organic chemical compound best recognized for giving vinegar its sour taste and pungent s...   » Read the article

Encyclopedia - Acetate: Encyclopedia - Acetate
Acetate, or ethanoate, is the anion of a salt or ester of acetic acid. The acetate ion has the formula CH3COO-, and is the conjugate base...   » Read the article

Encyclopedia - Abundance Of The Chemical Elements: Encyclopedia - Abundance Of The Chemical Elements
The abundance of a chemical element measures how common the element is, or how much of the element there is. Abundance of the chemical el...   » Read the article

Encyclopedia - Acetyl: Encyclopedia - Acetyl
Acetyl (IUPAC name ethanoyl) is the acyl of acetic acid, with chemical formula -COCH3, sometimes abbreviated to Ac (not to be confused wi...   » Read the article

Encyclopedia - Actinide: Encyclopedia - Actinide
The actinide series encompasses the 15 chemical elements that lie between actinium and lawrencium on the periodic table with atomic numbe...   » Read the article

Encyclopedia - Beryllium: Encyclopedia - Beryllium
Beryllium is the chemical element in the periodic table that has the symbol Be and atomic number 4. A toxic bivalent element, beryllium i...   » Read the article

Encyclopedia - 89 Number: Encyclopedia Ii - 89 Number - In Mathematics
Eighty-nine is the 24th prime number, following 83 and preceding 97. 89 is a Chen prime. It is the smallest Sophie Germain prime to start...   » Read the article

Encyclopedia - Radon: Encyclopedia Ii - Radon - Precautions
Radon is a carcinogenic gas. Radon is a radioactive material and must be handled with care at all times. It is hazardous to inhale this e...   » Read the article

Encyclopedia - The Elements Song: Encyclopedia Ii - The Elements Song - Lyrics
There's antimony, arsenic, aluminum, selenium, And hydrogen and oxygen and nitrogen and rhenium, And nickel, neodymium, neptunium, german...   » Read the article

Encyclopedia - Beryllium: Encyclopedia Ii - Beryllium - Occurrence
Beryllium is an essential constituent of about 100 out of about 4000 known minerals, the most important of which are bertrandite (Be4Si2O...   » Read the article

Encyclopedia - Protactinium: Encyclopedia Ii - Protactinium - History
Protactinium was first identified in 1913, when Kasimir Fajans and O. H. Göhring encountered short-lived isotope 234m-Pa, with a half-li...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - Production
Acetic acid is produced both synthetically and by bacterial fermentation. Today, the biological route accounts for only about 10% of worl...   » Read the article

Encyclopedia - Abundance Of The Chemical Elements: Encyclopedia Ii - Abundance Of The Chemical Elements - Abundance Of Elements In Earth
Scientists believe that the Earth formed from the same cloud of matter that formed the Sun. Abundance of the chemical elements - Abundan...   » Read the article

Encyclopedia - Radon: Encyclopedia Ii - Radon - Applications
In the United States and Europe there are a few "radon spas," where people sit for minutes or hours in a high-radon atmosphere in the bel...   » Read the article

Encyclopedia - Radon: Encyclopedia Ii - Radon - Notable Characteristics
Essentially chemically inert, but radioactive, radon is the heaviest noble gas and one of the heaviest gases at room temperature. (The he...   » Read the article

Encyclopedia - Radon: Encyclopedia Ii - Radon - History
Radon (named for radium) was discovered in 1900 by Friedrich Ernst Dorn, who called it radium emanation. In 1908 William Ramsay and Rober...   » Read the article

Encyclopedia - Radon: Encyclopedia Ii - Radon - Occurrence
On average, there is one atom of radon in 1 x 1021 molecules of air. Radon can be found in some spring waters and hot springs. The towns ...   » Read the article

Encyclopedia - Abundance Of The Chemical Elements: Encyclopedia Ii - Abundance Of The Chemical Elements - Abundance Of Elements In The Universe
Hydrogen is the most abundant element in the known Universe; helium is second. However, after this, the rank of abundance does not contin...   » Read the article

Encyclopedia - Abundance Of The Chemical Elements: Encyclopedia Ii - Abundance Of The Chemical Elements - Abundance Of Elements In The Solar System
The Solar System was created from the remnants of previous stellar systems that went supernova, and is hence, relative to the rest of the...   » Read the article

Encyclopedia - Radon: Encyclopedia Ii - Radon - Isotopes
There are twenty known isotopes of radon. The most stable isotope is radon-222, which is a decay product (daughter product) of radium-226...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - Nomenclature
The trivial name acetic acid is the most commonly used and officially preferred name by the IUPAC. This name derives from acetum, the Lat...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - History
Vinegar is as old as civilization itself, perhaps older. Acetic acid-producing bacteria are present throughout the world, and any culture...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - Safety
Concentrated acetic acid is corrosive and must therefore be handled with appropriate care, since it can cause skin burns, permanent eye d...   » Read the article

Encyclopedia - Protactinium: Encyclopedia Ii - Protactinium - Applications
Due to its scarcity, high radioactivity and toxicity, there are currently no uses for protactinium outside of basic scientific research. ...   » Read the article

Encyclopedia - Beryllium: Encyclopedia Ii - Beryllium - Precautions
Beryllium and its salts are toxic substances and potentially carcinogenic. Chronic berylliosis is a pulmonary and systemic granulomatous ...   » Read the article

Encyclopedia - Protactinium: Encyclopedia Ii - Protactinium - Isotopes
29 radioisotopes of protactinium have been characterized, with the most stable being 231-Pa with a half life of 32760 years, 233-Pa with ...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - Applications
Acetic acid is a chemical reagent for the production of many chemical compounds. The largest single use of acetic acid is in the producti...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - Chemical Properties
The hydrogen (H) atom in the carboxyl group (−COOH) in carboxylic acids such as acetic acid can be given off as an H+ ion (proton), giv...   » Read the article

Encyclopedia - Acetic Acid: Encyclopedia Ii - Acetic Acid - Biochemistry
The acetyl group, derived from acetic acid, is fundamental to the biochemistry of virtually all forms of life. When bound to coenzyme A i...   » Read the article

Encyclopedia - Beryllium: Encyclopedia Ii - Beryllium - Isotopes
Of beryllium's 10 isotopes, only beryllium-9 is stable. Cosmogenic beryllium-10 is produced in the atmosphere by cosmic ray spallation of...   » Read the article