Chemical elements

Today we might know an atom being the smallest piece of an element that represent an element, but you might not know the whole story. It all being in 1803, when a curious guy, known as John Dalton, who proposed an “atomic theory” with spherical solid atoms based upon measurable properties of mass. Later on Dalton introduced his belief that atoms of different elements could be universally distinguished based on their varying atomic weights. John Dalton's research not only changed the face of…

Formula of a Hydrated Salt 2.Objective- We are trying to figure out the formula of a unknown hydrated salt. In order to do this we must know the formula to calculate moles which is moles=Mass(g)/Molecular Weight. 3.Introduction- We must know about hydrated salts which are salts that contain water. We are trying to figure out the molar mass of the hydrated salt given to us. In order to do this we must heat up a hydrated salt so that it reverses the reaction and removes the water.We then are…

Morris Travers founded neon in 1898, by experimenting on liquid air. Prior to discovering neon they had recently found krypton, then later on they would go to discover xenon. “ Ramsay knew that sometimes one element could stay hidden behind another element (Stewart www.chemicool.com/elements/neon.html).” Neon was actually named by Ramsay’s son and was named neon after greek words neos (which means new). After Ramsay and Travers were able to keep finding neon it opened up a path for French…

to drink because of the water’s bitter taste. However, the farmer noticed the water seemed to heal scratches and rashes. The words spread out. Eventually it was recognised to be magnesium sulphate, MgSO4. Until 1755, it recognized magnesium as an element by Davy” ( Marker Winter) You can find magnesium around you such as in ladders, laptops, televisions, cell phones, luggage, aircraft and missile components. Human cannot live without magnesium. “Magnesium is a material for people looking for…

5-CinthiaV-Selenium The name of my element is Selenium. The element symbol is “Se”. Selenium was discovered in Sweden by Jons Jacob Berzelius in 1817. Selenium is an origin for a greek word meaning moon. Selenium has four energy levels. In the first energy level, it has two electrons. The second energy level has eight electrons. The third energy level has 18 electrons. The fourth energy level has six valence electrons. Selenium has forty-five neutrons. Selenium has the…

I read the book A Tale of Seven Elements by Eric R. Scerri. This book was published on June 20 of 2013 by Oxford University Press, USA and it contains 270 pages. A Tale of Seven Elements is a non fiction chemistry book. Overall this book talks about how seven elements - protactinium, hafnium, rhenium, technetium, francium, astatine and promethium - were discovered. These elements are referred to him as infra-uranium elements. Each element has its own chapter with a description to how it was…

One of the earliest metals to be discovered, lead has a long history with mankind. It was first discovered around 7000 BC as a byproduct of silver smelting. Lead is metal known for its resistance against corrosion, malleability, and low melting point. Mined all across the world, lead was one of the most important metals in ancient times. Although lead was toxic, it was used widely, particularly in the Roman Empire. Through its uses and toxicity, lead affected the classical era in a drastic way.…

SaskWater has received a Request for Service from the Town of Birch Hills requesting a peak flow of 130 igpm. An assessment was performed includes two of SaskWater existing systems. Option #1 the Melfort Regional Treated System (CLPOWSS); three scenarios were considered while investigating the CLPOWSS. Scenario #1 connects the Birch Hills community with the CLPOWSS, plus twining 5.5 km of the existing pipeline between Melfort and Kinistino, which would allow for 100% of average daily…

each white powder including the mystery powder with four different liquids. The liquids were; water, universal indicator, vinegar, and iodine. For example, when they mix the four liquids with the powder, one of the powders should have the exact same chemical and physical reactions as the mystery powder does. If none of the powders match the…

one’s in flint. The reason many people are not lead poisoned despite the fact that most of the pipe use to travel the water are made of lead. The reason lies in the complex chemical reactions that goes on between the pipes and the water that flow through it. “ inside the pipes, as the water goes through it, it react. The chemical reactions take place with the plumbing materials and this build up some kind of a protective coating, what they called a scale.this protective scale is very crucial,…