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Properties of ionic and covalent bonds
Ionic and covalent bonds
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Properties of Ionic and Covalent Bonds Explained
Within the last unit of Chemistry, the cause of ionic and covalent properties was revealed. The true predictor of the compound lies in the bonds that take place. Normally within an ionic bond there is a non-metal and a metal element bonded together. During the bonding elements completely transfer valence electrons between atoms. The metal within the bond loses the few electrons that it has in the outer-most shell which then causes the metal to achieve the octet rule. The nonmetals within the bond then gain the electrons to fill their outer-most shell and achieve the octet rule. On the other had covalent bonding is the sharing of valence electrons between atoms. Covalent bonding usually occurs between two nonmetals, due to similar electronegativity or same electron affinity. They are forced to share electrons rather than gain or lose an electron, and are still able to achieve octet rule. Due to the fact that ionic bonds transfer electrons and covalent bonds share electrons, there are many differing properties formed by the two...
This paper describes the methods used in the identification, investigation of properties, and synthesis of an unknown compound. The compound was identified as calcium nitrate by a variety of tests. When the compound was received, it was already known to be one of twelve possible ionic compounds. The flame test identified the presence of the calcium anion in the compound. The compound tested positive for the nitrate cation using the iron sulfate test. At this point it was hypothesized that the compound was calcium nitrate. Reactivity tests and quantitative analysis comparing the unknown compound with calcium nitrate supported this hypothesis. Synthesis reactions were then carried out and analyzed.
This chemistry book report is focus on a book called “Napoleon's buttons: How 17 molecules changed history” by Penny Le Couteur and Jay Burreson. The publisher of this book is Tarcher Putnam, the book was published in Canada on 2003 with 17 chapters (hey the number match the title of the book!) and a total of 378 pages. The genre of this book is nonfiction. “Napoleon's Buttons” contain a fascinating story of seventeen groups of molecules that have greatly changed the course of history and continuing affect the world we live in today. It also reveal the astonishing chemical connection among some unrelated events, for example: Chemistry caused New Amsterdamers to be renamed New Yorkers and one little accident of detonating cotton apron in a minor housekeeping mishap lead to the development of modern explosives and the founding of the movie industry.
Every chemical element or compound have specific properties that make them different than the other. However, these properties help us to understand every element or compound in which they can be used and how we can deal with them. These properties can be chemical properties which are defined as "that property must lead to a change in the substances ' chemical structure", such as heat of combustion and flammability ("Physical and Chemical…"). Also, these properties can be physical properties which are defined as the properties "that can be measured or observed without changing the chemical nature of the substance", such as mass, volume, boiling and freezing points ("Physical and Chemical…"). These two properties are related to each other. For
The study investigates the custom of coquetry, accolades, compliments, commendation, tributes and praise comments in South Asian street communication. Coquetry can be explained and demarcated as advances made by male strangers toward women in the public domain, and they typically include: strengthening, gazing, staring, ogling, and unsolicited sexual and romantic comments. Coquetry is much more than just a bit of fun: it is a universal and essential aspect of human interaction. Anthropological research shows that coquetry is to be found, in some form, in all cultures and societies around the world.
Studios, A. 2014. Chem4Kids.com: Sodium: Bond With It. [online] Available at: http://www.chem4kids.com/files/elements/011_comps.html [Accessed: 3 Mar 2014].
The Periodic Table is based around the Atomic Theory. Firstly people believed that everything was made up the four elements Earth, Fire, Wind, and Water. This theory evolved into everything being made up of atoms. Breakthroughs throughout history such as the discoveries of the nucleus, protons, neutrons and electrons have pushed this theory forward to where it is today.
To examine the interaction between two molecules in solution without isolating the compound Jobfs method is used. Although unstable compounds tend to be generated, this is not a reflection of weak interactions. In some cases, the transition metal species cannot be crystallized from the solution and separated from the other species present. Without Jobfs Method this composition can be very difficult to deduce.
Thickett, Geoffrey. Chemistry 2: HSC course. N/A ed. Vol. 1. Milton: John Wiley & Sons Australia, 2006. 94-108. 1 vols. Print.
The basic of structural functionalism is a theory that supports society as an intricate system that works as a whole to promotes a stabile society. The term race refers to groups of people who have differences and similarities based off of biological traits considered by society to be socially significant. The concept of race create stability and harmony because society demands group alignment, they are inherently ethnocentric. I do not believe that structural functionalism is the proper way to view race in the United Sates but I do know it is being done. I personally believe that using structural functionalism is a dysfunction because in today’s society others are judgmental when it comes to people
Have you ever wondered why different elements have different melting and boiling points? Why some Molecules melt faster or take longer to boil? It all comes down to the forces and structure among the molecule. They are refer to as Chemical Bonding and Intermolecular or Intramolecular forces. The changes in states are due to changes in forces among the molecules rather than in those within the molecules (Zumdal 451). In this paper the effects of Chemical Bonding and Intramolecular Forces on the melting and boiling points of chemicals will be explained.
Bonds and Equities Defining Bonds and Equities Bonds are certificates of obligation or indebtedness, issued by governments and companies to raise funds repayable at interest over relatively long periods. Equities are investments exercised by purchasing a share in the ownership of a corporation; and are more commonly called stocks or shares (as in the stock market or share market). Bonds have a very favorable relationship with equities. Historically, when equity markets fell, bonds had gone up in value, partially offsetting the fall. When equity markets rise, interestingly, high quality bonds also tend to rise, although to a lesser extent. Therefore for an investor with equity portfolio wanting to reduce portfolio volatility or make the portfolio less susceptible to a fall in equity markets bonds are the most appropriate. Bonds generally pay a much higher income than high quality government and corporate bonds to compensate for higher risk. Similar to equities, bonds tend to perform best when economic growth is strong with low stable interest rates. In such an environment the ability of these companies to pay interest and repay their bonds on the maturity date is greatly enhanced. [Z. Bodie, 2000] Investment in bonds and equities, usually via stock-markets and other exchanges for financial instruments. So-called "portfolio investment" is usually relatively easy to re-sell; hence this type of investment can flow relatively easily into and out of a country's stock-markets. This can lead to volatility in share-prices and levels of capital availability. What’s the difference? Equities are shares listed on the stock exchange. Their prices are influenced by the underlying performance of the companies, the sectors in which they operate ...
Plontke, R. (2003, March 13). Chemnitz UT. TU Chemnitz: - Technische Universität Chemnitz. Retrieved April 1, 2014, from http://www.tu-chemnitz.de/en/
Covalent bonds can also be formed in such a way as to form a giant
Ionic compounds, when in the solid state, can be described as ionic lattices whose shapes are dictated by the need to place oppositely charged ions close to each other and similarly charged ions as far apart as possible. Though there is some structural diversity in ionic compounds, covalent compounds present us with a world of structural possibilities. From simple linear molecules like H2 to complex chains of atoms like butane (CH3CH2CH2CH3), covalent molecules can take on many shapes. To help decide which shape a polyatomic molecule might prefer we will use Valence Shell Electron Pair Repulsion theory (VSEPR). VSEPR states that electrons like to stay as far away from one another as possible to provide the lowest energy (i.e. most stable) structure for any bonding arrangement. In this way, VSEPR is a powerful tool for predicting the geometries of covalent molecules.
Ions are critical to human health. As defined by Dictionary.com, an ion is an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons. The human body is the most intricate of ‘designs,’ despite the fact it is composed of basic natural resources called elements. The ions discussed in this paper include oxygen, carbon, potassium, and sulfur. A healthy body is composed of these ions, along with others (zinc, fluoride, iron, etc.). The absence of these elements could lead to an unhealthy body, and make it an easier target for diseases. The chemical formulas, charges, and properties will also be discussed in this document. Also, addressed is the essential role of the ion presented, the way in which the ion serves the body, the diseases that may result from deficiency, and the global distribution of these deficiencies. Ions are an essential part of human health. The ions that are present make the body’s daily functions possible, allowing it to be protected from cruel bacteria or diseases.