Creek in order to determine how the physical, chemical, and biological factors of the streams impacted the amount of life present within them. This investigation attempts to answer the question, “How are abiotic elements related to the number and abundance of macroinvertebrates found in the two streams?” Water quality is the term used to indicate a body of water’s suitability for use (Ayers 1976). Water quality can be assessed based on its physical, chemical, and biological characteristics that it portrays
The Element Gold Discipline: Chemistry I am going to discuss about the element known as gold in my assignment. To describe the element gold in simple terms, I can only say that it is an element (chemical element). This element is denoted by the symbol Au. It has an atomic number of seventy nine (79). I will describe quite a number of things concerning gold as an element. To begin with is: Physical properties Gold contains several properties that are visible through the human eye. It is these properties
SILVER Silver is an important elements in the Periodic table. Every element in the periodic table has a special symbol, and silvers special symbol is Ag. Silvers chemical symbol Ag is an abbreviation of the Latin word for silver. The Latin word comes from arguments a Sanskrit word that means shiny. Silver has been used since prehistoric times and it has and still plays an important role today. We do not know which person discovered it, but what we do know is that the Ancients discovered it. Silver
out by measuring the ages of each star. They have found trace elements of hydrogen and helium so we know that the Milky Way was formed and early in the history. Another good way to find the age of the stars in the Milky Way is measuring thorium because it has a half-life of 14 billions years after 14 billion the thorium should decay in another element. The formation of the Milky way started by observations concerning chemical abundances in stars and gas using
fractionation is an important process which occurs during chemical reactions when the abundances of the heavy isotopes in the reactants (A) are different from the abundances of the heavy isotopes in the product (B). Isotopes of one elements vary with neutrons and atomic mass, and therefore isotopes of the light elements (H, C, N, O, S) react at different rates in chemical reactions related to different thermodynamic properties. Isotopes of the same elements have different melting points, densities, vapor
consumers that move materials in quantity. This cause inputs and outputs of inorganic and organic nutrients The materials or compounds and elements found in all the spheres. Only in recent time have they began to understand the diversity roles of the biosphere. Each specie and species of a community contribute to the ecosystem. Ecosystems depend on chemical and physical conditions, along with the number communities and species of all the locations such as grasslands, forest and wetlands to name
of the Periodic Table and all its chemical elements. It’s a refreshing story of the oddity and obsession, associated with one of chemistry’s greatest creations. The tales of each element flawlessly lead to another, as Kean animates the history of the Periodic Table. Chapter 4 of The Disappearing Spoon describes the origin of all elements, which was theorized to have occurred during the big bang. People discovered that if this theory was accurate, than the elements would be seen in equal amounts throughout
Chlorine is a greenish yellow gas which combines directly with nearly all elements. Chlorine is a respiratory irritant. The gas irritates the mucous membranes and the liquid burns the skin. As little as 3.5 ppm can be detected as an odour, and 1000 ppm is likely to be fatal after a few deep breaths. It was used as a war gas in 1915. It is not found in a free state in nature, but is found commonly as NaCl (solid or seawater). Table: basic information about and classifications of chlorine. • Name:
Michael Chhun Ms. Morgan Honors Chemistry 22th November 2013 Uranium Uranium is an element that is part of the actinide series, is a solid at room temperature, and classified as a metal (Chemical Education). It was first discovered in 1789 by Martin Heinrich Klaproth (Chemistry). People believed the mineral was a mixture of ores of iron and zinc (Chemistry). In 1789 Klaproth realized that it contained an unknown metal (Chemistry). Uranium was given its name in honor of Uranus, which the world had
Because of this, it is a good conductor of heat and electricity as well as a highly reactive element, though the least reactive of the alkali metals. Lithium's low reactivity compared to other alkali metals is due to the proximity of its valence electron to its nucleus (the remaining two electrons are in lithium's 1s orbital and are much lower in energy, and therefore they do not participate in chemical bonds). Lithium metal is soft enough to be cut with a knife. When cut, it possesses a silvery-white
satellite in the galaxy, being second only to Ganymede yet larger than Mercury [1]. It is the only Satellite in the solar system to have a significant atmosphere that contains more than just traces of elements. It is of interest to astronomers to see how an atmosphere can be formed and how abundances of certain compounds can appear without biological activity. [2] Titan may be suitable for certain types of biology and is analogous to Earth in many ways. When Titan was first observed, it was thought
I. Abstract This paper will provide a detailed discussion about iron metal. The chemical, physical and mechanical properties of iron metal will be discussed. Additionally, the occurrence and major applications of the metal will also be provided. This is intended to provide an understanding of the iron metal and the chemistry around it. The geometry of coordination together with the different oxidation states will be included in the discussion. It should be noted that iron is one of the few metals
substances including barium, magnesium and strontium. Research the properties of the metal, its relative abundance in the Earth and the ways this metal can be used. Calcium is a solid, with a melting point of 〖842〗^0C. The boiling point of Calcium is 〖1484〗^0C. It is a shiny, soft substance. The estimated crustal abundance of Calcium is 4.15*〖10〗^4milligrams per kilogram. The estimated oceanic abundance of Calcium is4.12*〖10〗^2. This metal can be used to remove oxygen, sulphur, and carbon from certain
Platinum Platinum, symbol Pt, is a relatively rare, metallic element that is more expensive than gold. The atomic number of platinum is 78. Platinum is one of the transition elements in group 10 of the periodic table. Platinum is the most important of the group of elements called platinum metals. Also included in this group are the metals ruthenium, rhodium, palladium, osmium, and iridium. Platinum metals were probably used in alloyed forms in ancient Greece and Rome and were first mentioned
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. 1. When and how the element was
crucial in making up and distinguishing elements. This leads us to the analysis of the element copper. There are different ways in which the electrons are situated around a copper atom, and all atoms, for that matter. The first aspect of an electron configuration is the energy level (n number, or principle quantum number) the electrons reach. Each period of the period table represents an energy level. The number of electrons (equal to the number of protons) an element possesses, for the most part, dictates
atomic mass of titanium is about 47.87 [3]. This explains why it’s fairly cheap to export a material of this element. Other materials used for the Canadarm are aramid fibers [1] such as Kevlar [7]. This aerospace material is also used in bulletproof vests [12]. These aramid fibers are fibers in which the chain molecules are highly oriented along the fiber axis, so the strength of the chemical bond can be exploited [1]. Kevlar is also flame resistant [12] which bolds well in space due to the extreme
The emission spectrum of an element is the spectrum of frequencies in electromagnetic radiation emitted due to a specific atom's electrons, creating a transition from a high energy to a low energy state. There are many possible electron transitions for each different atom in which the transition has a specific energy difference. The collection of different transitions leads to different radiated wavelengths and in turn makes up an emission spectrum. Each element's emission spectrum is unique and
Iron is an important element to the scientific community, especially those involved in the branch of chemistry. Consequently, humans rely on iron for many different things. Iron is diverse from all other elements with regards to its natural occurrence, historic and contemporary uses, the origin of its name, and when, how, where, and by whom it was discovered. It also has unique characteristic physical and chemical properties. Without the discovery, and distinctive properties of iron, life on Earth
Properties of Metalloids Metalloids are elements that share properties of both nonmetals and metals. They usually share physical properties with metals and chemical properties with nonmetals. Although they are not as good at conducting electricity and heat as metals, metalloids can still act as semiconductors; they can act as conductors in the right condition. Metalloids are solid at room temperature and are semiconductive. Being semiconductive means that, in the right conditions, metalloids can