Promethium Facts - Periodic Table of the Elements

Promethium Facts - Periodic Table of the Elements Promethium is a radioactive rare earth metal. Heres a collection of interesting promethium element facts: Interesting Promethium Facts The original spelling of the name promethium was prometheum.The element is named for Prometheus, the Titan who stole fire from the Greek gods to give to mankind.Promethium was the last rare earth element of the lanthanide series to be discovered. It was discovered in 1945 by  Jacob A. Marinsky, Lawrence E. Glendenin, and Charles D. Coryell, although its existence had been predicted in 1902 by Czech chemist Bohuslav Brauner. Marinskys group found promethium in uranium fission products during Manhattan Project research in Oak Ridge, TN.All of the isotopes of promethium are radioactive. It is the only radioactive rare earth metal and it is one of only two radioactive elements followed by stable elements on the periodic table. The other element like this is technetium.Promethium isotopes generate x-rays via beta decay. 29 isotopes are known, with mass numbers from 130 to 158.Promethium is prepared in a lab. It is extremely rare on Earth, although it has been detected in pitchblende spe cimens from the radioactive decay of uranium. The only stable oxidation state of promethium is 3, although it can be made to display the 2 oxidation state. This is common with lanthanide elements.The pure metal has a silvery appearance. Salts of promethium glow pale blue or green, due to radioactive decay.Because of its radioactivity, promethium is considered toxic.Promethium compounds have several practical applications, all more to deal with its radioactivity than its chemical properties. The earliest pacemakers used nuclear batteries that relied on promethium. It is used in missile and spacecraft power sources, as a beta source for thickness gauges, and to make luminous paints. Promethium Chemical and Physical Properties Element Name: Promethium Atomic Number: 61 Symbol: Pm Atomic Weight: 144.9127 Element Classification: Rare Earth Element (Lanthanide Series) Discoverer: J.A. Marinsky, L.E. Glendenin, C.D. Coryell Discovery Date: 1945 (United States) Name Origin: Named for the Greek god, Prometheus Density (g/cc): 7.2 Melting Point (K): 1441 Boiling Point (K): 3000 Covalent Radius (pm): 163 Ionic Radius: 97.9 (3e) Specific Heat (20 °C J/g mol): 0.185 Pauling Negativity Number: 0.0 First Ionizing Energy (kJ/mol): 536 Oxidation States: 3 Electronic Configuration: [Xe] 4f5 6s2 References: Los Alamos National Laboratory (2001), Crescent Chemical Company (2001) Return to the Periodic Table

How to Cite a Newspaper Article in Vancouver Referencing

How to Cite a Newspaper Article in Vancouver Referencing How to Cite a Newspaper Article in Vancouver Referencing Even in an era of fake news, you can’t get away with fake referencing. Thus, if you need to cite a newspaper article in your work, make sure you know how to do it properly. In this post, for example, we’re looking at how to cite a newspaper article in Vancouver referencing. How to Cite a Newspaper Article in the Main Text When citing a newspaper article in Vancouver referencing, the basic citation format is the same as for any other source. This means using numbers in brackets to indicate a citation, typically after final punctuation: The Shonky Awards highlight problematic products. (1) These bracketed numbers point to an entry in the reference list at the end of the document, with sources numbered in the order they are first cited. Above, for example, we’d be citing the first entry in the reference list (which would also be the first source cited in the document). The main variations on this format are as follows: You can cite sources mid-sentence when an author is named in the text. You should include page numbers when quoting a source directly. We can see both variations in the following passage: A report by Clun (1) on the Shonky Awards sheds light on current consumer culture. These awards publicize brands, products and companies that are â€Å"taking advantage of Australian consumers† (1: p. 84). Here, we give the first citation immediately after the author’s surname. And in the second citation, we show that we’ve quoted page 84 of the newspaper. Newspaper Articles in the Reference List The general format for a print newspaper article in your reference list is: (Citation Number) Author Surname and Initial(s). Title of article. Title of Newspaper: Section. Year Month Day: Page number(s). Typically, you would also abbreviate the month here (e.g., â€Å"October† would become â€Å"Oct†). In practice, then, a reference might look like this: (1) Clun R. Choice awards Shonky to Commonwealth Bank’s Dollarmite program. Sydney Morning Herald: Business. 2018 Oct 4: 84-85. The format is mostly the same for an online article, but you should include: A date of citation (i.e., when you last accessed the article) followed by the words â€Å"cited in† in square brackets after the date of publication. A URL for the article instead of page numbers. This should be placed after a full stop and the words â€Å"Available from.† We would therefore list an online version of the article above like this: (1) Clun R. Choice awards Shonky to Commonwealth Bank’s Dollarmite program. Sydney Morning Herald: Business. 2018 Oct 4 [cited 2018 Nov 25]. Available from: https://www.smh.com.au/business/consumer-affairs/choice-awards-shonky-to-commonweath-bank-s-dollarmite-program-20181004-p507nv.html Vancouver Variations You can use the format above to cite a newspaper article. However, there are many versions of Vancouver referencing. You should therefore check your university’s style guide (if available) for their preferred reference format. If you do not have a style guide, simply apply a clear and consistent referencing style throughout your document.