In 1807, a man by the name Sir Humphrey Davy discovered Potassium in London, England (Barbalance, Environmental-Chemistry). Potassium was the first element to be found through electrolysis (Softschools). Electrolysis is the chemical decomposition produced by passing an electric current through a liquid or solution containing ions. In addition to electrolysis, thermal methods are also used to produce potassium. Thermal method is a mixture or a reactant that I measured as a function of temperature or time while the sample is subjected to a controlled temperature program. Potassium Is a pure element, but it can also be found in mixtures. Potassium, however, is a silvery-grey metal formerly named Kalium hence the symbol K.
Potassium is number ninteen on the Periodic Table. Potassium has ninteen protons and electrons. Protons are a stable subatomic particle occurring in all atomic nuclei, with a positive electrical charge. Electrons are a stable subatomic particle with a charge of negative electricity. To determine how many protons and electron are in an atom, find the atomic number. Since Potassiums atomic number is nineteen, there are nineteen protons and however many protons there are there will be the same number of electrons. By using the periodic table, we can determine how many neutrons there are. Neutrons are a subatomic particle of about the same mass as a proton but without an electric charge. To find how many neutrons there are you subtract the atomic weight by the atomic number.
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Potassium has a melting point of 63.7 C and a boiling point of 759 C (Green,Pg.30-31).When Potassium is added to water it burst into lilac flames (Green,Pg.30-31). Lilac is a variable color averaging a moderate
The unknown bacterium that was handed out by the professor labeled “E19” was an irregular and raised shaped bacteria with a smooth texture and it had a white creamy color. The slant growth pattern was filiform and there was a turbid growth in the broth. After all the tests were complete and the results were compared the unknown bacterium was defined as Shigella sonnei. The results that narrowed it down the most were the gram stain, the lactose fermentation test, the citrate utilization test and the indole test. The results for each of the tests performed are listed in Table 1.1 below.
However, only experiments IV “Effect of Copper Metal” and V “Effect of Temperature” had reasonable results, so copper metal and temperature are the more effective factors. The less effective factors are the changes in concentrations of "H" ^"+" ions and "C" _"2" "O" _"4" "H" _"2" particles. This observation is represented in experiments II “Effect of "H" ^"+ " Ions” and III “Effect of "C" _"2" "O" _"4" "H" _"2" Concentration.” Both runs 2B and 2C had the fastest times of 25 seconds and 86 seconds
One of the most primitive actions known is the consumption of lactose, (milk), from the mother after birth. Mammals have an innate predisposition towards this consumption, as it is their main source of energy. Most mammals lose the ability to digest lactose shortly after their birth. The ability to digest lactose is determined by the presence of an enzyme called lactase, which is found in the lining of the small intestine. An enzyme is a small molecule or group of molecules that act as a catalyst (catalyst being defined as a molecule that binds to the original reactant and lowers the amount of energy needed to break apart the original molecule to obtain energy) in breaking apart the lactose molecule. In mammals, the lactase enzyme is present
In this lab, I took two recordings of my heart using an electrocardiogram. An electrocardiogram, EKG pg. 628 Y and pg. 688 D, is a recording of the heart's electrical impulses, action potentials, going through the heart. The different phases of the EKG are referred to as waves; the P wave, QRS Complex, and the T wave. These waves each signify the different things that are occurring in the heart. For example, the P wave occurs when the sinoatrial (SA) node, aka the pacemaker, fires an action potential. This causes the atria, which is currently full of blood, to depolarize and to contract, aka atrial systole. The signal travels from the SA node to the atrioventricular (AV) node during the P-Q segment of the EKG. The AV node purposefully delays
Together extra-renal factors (insulin, epinephrine, aldosterone) and renal factors maintain a normal potassium plasma concentration in the body. The extra-renal mechanisms are responsible for moving potassium into the intracellular compartment. The renal mechanisms are responsible for chronic maintenance of body potassium content. When these mechanisms are functioning correctly, large intake of potassium has a minor and insignificant effect on the potassium concentration in the plasma. [5&6]
Protons are positively charged and electrons are negatively charged. Protons and electrons both have charges of equal magnitude (i.e. 1.602x10-19 coulombs). Neutrons have a neutral charge, and they, along with protons, are the majority of the mass in an atom. Electron mass, though, is negligible. When an atom has a neutral charge, it is stable.
The discovery of the element Krypton is quite interesting. Two chemists came upon the discovery and those two are: Sir William Ramsay, who is from Scotland, and Morris M. Travers who is from our homeland. This element was founded on May 30, 1898. The way that those two came upon the element Krypton was that they first found the elements Argon and Helium. From using their common knowledge they figured that there had to be some elements between those two on the periodic table, so they did a ton of experiments and through trials and trials they came up with a couple more elements and one of those elements was Krypton. Next the essay will discuss the shap...
In 1790 a discovery was made by an Irish Chemist named Adair Crawford. This discovery was the thirty-eighth element on the periodic table, Strontium. Its name comes from the town Strontian, Scotland where it was discovered. Strontium is a metal and belongs to the alkaline earth metals. “The alkaline earth elements are metallic elements found in the second group of the periodic table. All alkaline earth elements have an oxidation number of +2, making them very reactive. Because of their reactivity, the alkaline metals are not found free in nature” (Bentor). Being in period number five, Strontium has an atomic number of thirty eight which represents the number of protons in the nucleus. There are approximately eight-seven point sixty-two protons and neutrons in the atom which gives Strontium its atomic mass. Another way that Strontium can be represented is through its symbol Sr.
Sodium was founded in 1807 by an English Chemist named Sir Humphrey Davy (Bentor). It was found through the electrolysis of caustic soda (The Element). This means that he found a way to extract sodium from compounds (Newton). First Sir Humphrey Davy would extract a number of active elements and then pa...
Potassium is a solid silvery white element. It is soft and can be cut with a knife. Potassium is the least dense known metal, besides lithium. It is the seventh most abundant element. It makes up about 1.5% by weight of the earth's crust. It decomposes in water because of the hydrogen. It usually catches fire during reaction with water.
Although it is colorless, it is characterized by its incredible red-orange and green spectral lines. A known property of rare gases, it is white and crystalline, with a cubic crystal structure that is face – centered (when solid). Krypton is not usually used to form compounds. However, some krypton compounds exist. Krypton is composed of thirty-six protons, meaning its atomic number is also thirty-six. It has a melting point of 115.79 K (Kelvin) and a boiling point of 119.93 K. This element is a non-metal and can be found in period 4, group 18 of the Periodic Table. Krypton has five stable isotopes and an oxidation state of 0. There are 33 known isotopes of Krypton with atomic mass numbers from 69 through 101. Naturally taking place, Krypton is made of six stable isotopes, two of which might theoretically be slightly radioactive, plus traces of radioisotopes that are produced by cosmic rays in the atmosphere. The element has a relative atomic mass of 83.798. Since krypton is in the far right row of the periodic table, its outer layer contains eight
Nitrogen is a colorless, odorless gas that can be found in group 15 of the periodic table. Nitrogen is represented by the symbol, N, and has an atomic number of 7. This element was discovered by Daniel Rutherford in 1772. Mr. Rutherford studied Edinburgh University where he began his research on this gas. It started with an experiment including a mouse in a small enclosed area, and from there concluded that the air being released by the mouse was what we know as Nitrogen. At room temperature this element is a gas. Nitrogen has an atomic number of 7, and its isotopes number 14. Other important things to note about this element is the electron configuration which is [He]2s^22p^3, as well as its density which numbers 1035 K.
In 1803, John Dalton published a list of elements. He tried to make a system to make the elements easier to remember and write. The original ...
Potassium also Keeps other electrolytes in balance so you don't get electrolyte imbalance which is not so fun sounding after what I told you earlier.