ABSRACT
Elements have been found all over the earth throughout the last century. Many elements are derived from the planets existence and overall creation. The alkali earth element strontium occurs naturally but only in combination with other elements such as celestine and strontianite. It has similarities to other members in the alkali earth family. This element is stable in its original state, and not harmful to human health. Many sea creatures that have shells such as clams, crustaceans’, oysters, and coral contain strontium. Strontium-90 is a product from atomic testing in the atmosphere during the 50’s. This product was absorbed into the earth by water, plants, animals, and even people. People absorb strontium into bones just like calcium, human have a small percentage of strontium in bones, yet the reason and the purpose is unknown.
INTRODUCTION
Strontium is one of many
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Equation: 2Sr(s) +O2 (g) →2SrO(s) (strontium oxide)
Equation: 3Sr(s) +N2 (g) →Sr3N2(s) (strontium nitride)
Strontium is very volatile with the select few halogens on the periodic table. Strontium reacts with chloride, bromide, and iodide to burn like a red flame, this flame is similar to that of a road flare. This reaction occurs at a temperature of 400 degrees Celsius.
Equation: Sr(s) +Cl2 (g) →SrCl2(s) (strontium (II) chloride)
Equation: Sr(s) +Br2 (g) →SrBr2(s) (strontium (II) bromide)
Equation: Sr(s) +I2 (g) →SrI2(s) (strontium (II) iodide)
The strontium metal when combined with hydrochloric acid responds instantaneously and violently. This reaction produces a gas, bubbles, fizz, and the strontium bounces around in the hydrochloric acid and breaks down immediately.
Equation: Sr(s)+2HCl(aq)→Sr2+(aq)+2Cl(aq)+H2(g) aquated Sr(II) ion with hydrogen gas
In chapter 8 titled "Radium (Ra)" of The Poisoner's Handbook by Deborah Blum, the most interesting story developed within this chapter was the death of dial workers at Orange, New Jersey after been exposed to radium every day. It was interesting due to the fact that radium was used everywhere in the community and was never thought it could harm anyone. Radium was a super element that was used everywhere, but its continuous use unmasked its fatal habits. As it was stated in the text, "Radiant health, the ads proclaimed-beautiful skin, endless vigor, and eternal health—ingesting radium seemed the next best thing to drinking sunlight." (Blum 179). People were accepting radium as a natural gold element but they haven't realized constant contact
Sulfur-35 is a radioactive isotope, used commercially to make rubber and gunpowder. It is an essential and vital nutrient for crops, animals, and people. It is in breast milk and can also be used as a fertilizer. Sulfur is in our food and we are exposed to it in our diet.
This reaction is carried out at low temperatures because the diazonium salt is stable at low temperatures. At low temperatures the system is stable and the molecular movement is quite low. Potassium iodide and water is added and the mixture separates, the mixture is put on a hot plate and heated to 40ᵒ once the mixture has reached this temperature a vigorous reaction occurs, gas evolution (purple gas) and the separation of the tan solids take place, this happens because once the gas is let out the carbon receives a plus charge given from the electron which turns in to a free radial which is more stable than a plus charge. When this reaction completes the chorine and the free radical combine. Potassium iodide works as a facilitator for this
Calcium is the 20th element of the periodic table. It is a metallic element that is greyish-silver in colour and has the atomic symbol of Ca. It is a group 2 alkaline earth metal and is the 5th most abundant element by mass in earth’s crust. It is also reactive with water and is relatively soft. It is an essential element for organisms, and is major material that is used in the materialisation of teeth, bone and shells. It is also the most abundant metal located within animals.
Strontium was discovered by Adair Crawford, an Irish chemist, in 1790 while studying the mineral witherite (BaCO3). When he mixed witherite with hydrochloric acid (HCl), he did not get the results he expected. He assumed that his sample of witherite was contaminated with an unknown mineral, a mineral he named strontianite (SrCO3). Strontium was first isolated by Sir Humphry Davy, an English chemist, in 1808 through the electrolysis of a mixture of strontium chloride (SrCl2) and mercuric oxide (HgO). Strontium reacts vigorously with water and quickly tarnishes in air, so it must be stored out of contact with air and water. Due to its extreme reactivity to air, this element always naturally occurs combined with other elements and compounds. Strontium is very
I figured out that my unknown compound is SrNO3 (Strontium Nitrate). The metallic ion in this compound is Strontium (Sr). I figured this out in the flame test because I recorded that SrCl2 had an orange-red flame, and that’s also the same color flame that my unknown compound had. I knew that Strontium was the metal in that compound since it was said first in the formula, so I didn’t include Chloride.
In 1787, an unusual rock, which had been found in a lead mine at Strontian, Scotland, was investigated by Adair Crawford. He realized it was a new mineral containing ‘earth’ which he named Strontia. In 1791, Thomas Charles Hope made a fuller investigation and proved it was a new element. He also noted that it caused the flame of a candle to burn red. Strontium metal itself was first isolated in 1808 by Humphry Davy. Strontium is named after Strontian, a small town in Scotland, where it was found.
Astatine (85At) and Francium (87Fr) are both rare elements found in nature, and are highly radioactive. Astatine was produced by Dale R. Carson, K.R. MacKenzie and Emilio Segrè, by accelerating Bismuth ions in a device called “Cyclotron”, but also found in the waste uranium. Francium was discovered by Marguerite Catherine Perey, a French chemist in 1939, and it is found in its purest form in nature, but is really scarce in the Earth’s crust.
into houses as a result of the decay of radium, thorium, or uranium ores underground and varies greatly
The Army Chemical, Biological, Radiological, Nuclear Survey Teams find out information on an enemy target in order to defend the country against the threat of CBRN weapons and Weapons of Mass Destruction. The Army has drastically evolved in terms of the Chemical Corp. Today there are multiple units around the world that operate in Survey Teams. The two most popular units in the Chemical Corp are Technical Escort Units and Chemical Reconnaissance Detachments. There is much confusion about what the operations of these two units entail. This research paper will describe what they do as well as discuss the similarities and differences between the two.
A chemical reaction occurs when one or more substances change to produce one or more different substances. For example, some evidence that a chemical reaction has occurred is possible changes in energy, release of energy, formation of a new substance, or reduction or increase in temperature. This lab will be conducted in order to create a chemical reaction by changing the reaction rate of a substance. In order to change the reaction rate, a catalyst needs to be added.in this case the catalyst in a hydrogen ion. Iodine and propane will be mixed and then catalyzed by the hydrogen ions, in turn helping to change the rate of the reaction.
Tritium is a hazardous substance that should only be used by professionals or with professional supervision. However, Tritium undergoes beta decay, which is not as powerful and disables the beta particles from penetrating the skin. It is still not correct to perform experiments without being fully protected. There are still many health risks that are associated with Tritium. Exhaling, drinking and eating substance containing tritium is highly risky for your body. Once tritium has been injected or ingested into the human body, the half-life of the tritium is minimized to 7-14 days which also minimizes the power of the tritium, but still dangerous. A research which took place in Karnataka, India, shows that the half-life is partially based on
In this experiment, two qualitative analysis techniques were used to determine the identities of two unknown cations in a solution. The first technique relied on the solubility, and lack thereof, of various salts, and the second relied on the characteristic flame colors that various cations produced. First, the presence of either lead or silver was confirmed by testing a precipitate obtained through centrifugation of the unknown solution. Then, the presence of either barium or calcium was confirmed in the liquid decanted during the previous test. These first two tests were composed of various reactions that created an insoluble salt of the cation being tested, which settled down as a precipitate. Finally, cation flame tests were performed on
For the nuclei of two atoms to overcome the aversion to one another caused they are having the same charge, high temperatures and pressures are required. Temperatures should be approximately six times those found in the core of the sun. At this heat, the hydrogen is no longer a gas but a plasma, where electrons are stripped from their atoms. (HyperPhysics.Phy, 2017). There are two basic reaction types. One, those that preserve the number of protons and neutrons and two, those
Stability: chemically it is very stable gas to the extent that it doesn’t react when it is treated with HNO3, K2Cr2O7, and KMnO4.