Chemical element Essays

  • The Importance Of Chemical Elements

    1020 Words  | 5 Pages

    periodic table is a useful arrangement of the chemical elements. These elements are usually listed in rows. These elements are listed in order based on the increasing atomic number; also known as the number of protons there are in each element. They are also listed with the atomic number, and a symbol which can be referred to as the shorter title. Along with the other information on the table, the atomic weight for each element is given. The elements listed in the periodic table are separated into

  • Thallium: Metallic Chemical Elements

    1098 Words  | 5 Pages

    Metallic chemical element chemically active, soft white color, symbol Cs, is located in the first group of the periodic table which means that he belongs to a group of alkaline elements. Atomic number 55 and atomic weight 132.905, the melting point of 28.4 degrees Celsius and a boiling point of 671 degrees Celsius and density of 1.87 g / cm 3. Cesium was discovered in 1860 by the German chemist Robert Bunsen, German physicist Gustav Kirchoff during the use of the spectroscope when they analyzed the

  • Essay On Chemical Compounds

    718 Words  | 3 Pages

    Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form and combined in chemical compounds. A sample of any given pure element is composed only of the atoms characteristic of that element, and the atoms of each element are unique. For example, the atoms that constitute carbon are different from those

  • Aluminium Gallium Arsenide Research Paper

    917 Words  | 4 Pages

    It is the third most abundant element in the universe after oxygen and silicon. It is approximately present ( 7.5% to 8.3% ) on the earth crust. It also occurs in sea water but its concentration is very low about ( 0.01 mg ). In 1827 AD , F Wholer , heated the Anhydrous

  • History Of Titanium

    1449 Words  | 6 Pages

    present on earth at 0.6% which makes it one of the most abundant element that we have. Several names in the history are responsible for today’s importance of titanium and itsalloys in numerous disciplines. It took until 1791 to set the first suspicious on the existence of a new metal by William Gregor. Four years later, the German chemist Martin Heinrich Klaproth isolated titanium oxide from the mineral “rutile” and he named the element Titanium after the Titans from the Greek mythology. However, production

  • Heavy Metal Essay

    3799 Words  | 16 Pages

    1.1 BACKGROUND OF STUDY Heavy metal refers to any metallic chemical element that has a high density and is toxic or poisonous at low concentrations (Ojovan & Lee, 2005). According to Ojovan and Lee, heavy metals include mercury (Hg), cadmium (Cd), arsenic (Ar), chromium (Crow), and lead (Pb). Heavy metals are natural components of the Earth’s crusts; they cannot be degraded or destroyed. They can enter human body in various ways including via the appliances of cosmetics on our body. Some heavy metals

  • Essay On Cobalt

    808 Words  | 4 Pages

    Trace element “A chemical element whose concentration is very low and required only in small amounts by living organisms for normal growth or in a particular sample or environment.” Cobalt Cobalt is trace element which is found on earth crust only in chemically combined form. The free element produced by smelting, is a hard lustrous, silver-gray colored metal. Physical properties • Color Metallic gray • Density 8.90g/cm3 • Boiling point 3200K (1495C) • melting

  • Acetylene Synthesis

    988 Words  | 4 Pages

    1.1 USES: Acetylene (C2H2 ) is extremely reactive , having commercial importanc organic compound. it's employed in Fusion welding (process of joining metallic parts).Acetylene is employed as a primarily staple for the synthesis of no of organic chemicals . massive quantities of ethyne are employed in metal cutting. Its small scale use of is within the preparation of vinyl ethers from alcohols along with phenols using Na-or K-hydroxide as catalyst in liquid phase. Large amount of alcohols will be

  • Essay On Vanadium

    1459 Words  | 6 Pages

    The Element Vanadium and its Uses Vanadium was discovered by Andrés Manuel del Rio, a Mexican chemist, in 1801. Rio sent samples of vanadium ore and a letter describing his methods to the Institute de France in Paris, France, for analysis and confirmation. Unfortunately for Rio, his letter was lost in a shipwreck and the Institute only received his samples, which contained a brief note describing how much this new element, which Rio had named erythronium, resembled chromium. Rio withdrew his claim

  • Aluminum Oxide Research Paper

    1021 Words  | 5 Pages

    9/3 21 February, 2016 RESEARCH PARAGRAPHS ALUMINUM OXIDE Aluminum oxide is a chemical compound with the chemical formula Al2O3 which consists of oxygen and aluminium. It is found in the nature as the mineral corundum which is colourless and very hard substance used as an abrasive. Aluminum oxide is characterised with its colour, insolubility in

  • Transition Elements: Cadmium

    1326 Words  | 6 Pages

    Cadmium is a transition element with the symbol Cd and is located in the d-block. Cadmium is element 48, having atomic mass 112.4gmol-1, density 8.6 gcm-3, mp 320 0C and bp 7650C. It belongs to group IIB of the periodic table and is relatively rare metal, being 67th in order of elemental abundance (Alloway , 1995). It has eight isotopes; 106Cd, 1.22%; 108Cd 0.88%. 110Cd, 12.39%; 111Cd, 12.75%; 112Cd, 24.07%; 113Cd, 12.26%; 114Cd, 28.86%; and116Cd, 7.58%. Cadmium is highly toxic and should therefore

  • Titanium Research Paper

    995 Words  | 4 Pages

    analyzed a mineral rutile (TiO2) and he named the element titanium after the Titans, the powerful sons of the earth in Greek mythological [Polmer (2006)]. Titanium is the fourth gorgeous metal after aluminum, iron, and magnesium. Extraction of titanium from its ores was not developed on a commercial scale until the Kroll’s process was developed in 1950. Today, a large number of titanium and titanium alloys are used in various applications like chemical and petrochemical industries as well as other consumer

  • Arsenic Research Paper

    1038 Words  | 5 Pages

    mass is 74.9216amu. Arsenic is a metalloid, which means it has properties of both nonmetals and metals. This element is also a semiconductor. Arsenic has 8 Isotopes and Its density is 5.72 g/cm3. Arsenic has a melting point of 817.0 °C, and Its boiling point is 613.0 °C. Arsenic has a rhombohedral crystal structure, and it is usually found in a solid form while on earth. This element is found in group 15, p-block, on the periodic table, and Its period is period 4. Its electron configuration

  • Chemistry: The Element Silicon

    1362 Words  | 6 Pages

    THE ELEMENT SILICON. The element silicon was named after the latin word for hard stone or flint (silex). It is considered to be the seventh most abundant element in the universe and the second most abundant on the earth, (27.7%) after oxygen. Being a stable tetrahedral, the element is chemically considered to be highly versatile or reactive. Silicon is a tetravelant metalloid of atomic number 14, the element posses the properties of both metals and non-metals. Its chemical symbol is Si and it has

  • History Of Atom Research Paper

    776 Words  | 4 Pages

    person to develop the idea of the atom. His studies on gases he created five assumptions about atoms, some of which are still relevant today: all matter is composed of atoms, atoms cannot be created or destroyed, all atoms of the same element at identical, chemical reactions occur when atoms are rearranged, compound are formed by the combination of two or more atoms.

  • Atomic Engineering Nannoparticles: Silicon Oxide

    3641 Words  | 15 Pages

    Abstract: This article describes the synthesis of nanoparticles: Silicon Oxide and Iron oxide and their characterization. 1. INTRODUCTION The first mention of some of the distinguishing concepts in technology (but predating use of that name) was in 1867 by James Clerk Maxwell when he proposed as a thought experiment a tiny entity known as Maxwell’s Demon able to handle individual molecules. In 1959, Cattech physicist Richard Feynman gives his famed talk “There’s Plenty of Room at the Bottom”, outlining

  • Essay On Carbon Allotropes

    1215 Words  | 5 Pages

    The aim of this essay is to explain the chemical and physical properties of carbon allotropes which are graphite, diamond, buckminsterfullerene, amorphous carbon and their applications in industry. Allotropes are element which is made up of the same material and have different ways of bonding to form different structure (NOVA 1995)(KALDOR 1988).There are four types of carbon allotropes which are diamond , graphite ,amorphous carbon and buckminsterfullerene (Evan, 2001) . Graphite is a slippery

  • Advantages And Disadvantages Of Radiopharmaceuticals

    784 Words  | 4 Pages

    are atoms that contain the same number of protons but have different numbers of neutrons (What is Isotope). These isotopes contain similar chemical properties but have different physical properties due to their atomic mass. Or in other words, isotopes have the same atomic number but differ in mass (What is an Isotope). “There are 90 naturally occurring elements with roughly 250 stable isotopes, and over 3200 unstable or radioactive isotopes” (Why are Isotopes Important). A stable isotope is an isotope

  • Boron Research Paper

    1915 Words  | 8 Pages

    1.1 Boron History & Overview: Boron is an element of the periodic table belonging to the group 13. It is the only non metal present in its group. Boron has three valence electrons. It is capable of forming covalent bonds between atoms of similar nature to form polyhedral clusters. Boron has 2 stable isotopes in nature. i.e.11B (80.1%) and 10B (19.9%). Boron exists in bound state. Figure1. Elemental form of boron The history of boron is derived from almost 6000 years ago, when boron compounds

  • Pros And Cons Of Sulphur

    1234 Words  | 5 Pages

    Sulphur is a yellowish, non-metallic chemical element in the periodic table. It is found in group 6 and period 3. Sulphur is identified by the letter S. Since Sulphur is the 16th Element of the periodic table therefore atomic number is always similar as the proton number which is located in the nucleus and converts the nucleus in to a positive charge as neutron is a neutral charge (+-) so positive (+) plus neutral (+-) equals a positive charge. The atomic mass for sulphur is 32 amu or (Atomic Mass