Search results
Results From The WOW.Com Content Network
List of chemical elements. 118 chemical elements have been identified and named officially by IUPAC. A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z ). [ 1]
A chemical weapon agent (CWA), or chemical warfare agent, is a chemical substance whose toxic properties are meant to kill, injure or incapacitate human beings. About 70 different chemicals have been used or stockpiled as chemical weapon agents during the 20th century. These agents may be in liquid, gas or solid form.
Md. No. Legend. Values are in kelvin K and degrees Celsius °C, rounded. For the equivalent in degrees Fahrenheit °F, see: Boiling points of the elements (data page) Some values are predictions. Primordial From decay Synthetic Border shows natural occurrence of the element. s-block.
Attack helicopter. A British AgustaWestland Apache helicopter fires rockets at insurgents in Afghanistan, June 2008. An attack helicopter is an armed helicopter with the primary role of an attack aircraft, with the offensive capability of engaging ground targets such as enemy infantry, military vehicles and fortifications.
AAA – Anti-aircraft artillery "Triple A". AAAV – Advanced Amphibious Assault Vehicle. AAC – Army Acquisition Corps. AAD – Armored amphibious dozer. AADC – Area air defense commander. AAE – Army acquisition executive. AAG – Anti-aircraft gun. AAK – Appliqué armor kit (US) AAL – Additional authorization list.
The Gmelin rare earths handbook lists 1522 °C and 1550 °C as two melting points given in the literature, the most recent reference [ Handbook on the chemistry and physics of rare earths, vol.12 (1989)] is given with 1529 °C. The World Book encyclopedia from 2002 lists 1529 °C. 89 Ac actinium (Ac-227 ?)
This is a list of games for the Sony PlayStation 2 video game system. Title names may be different for each region due to the first language spoken. The last game for the PlayStation 2, Pro Evolution Soccer 2014 was released on 8 November 2013.
The periodic table is a tabular arrangement of the chemical elements, organized by their atomic number, electron configuration, and chemical properties. It is a useful tool for understanding the patterns and trends of the elements and their interactions. Learn more about the history, structure, and significance of the periodic table on Wikipedia.