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Elements, Mixtures and Compounds

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Iron sulfide however will require a chemical reaction to separate the iron and sulfur (Leong & Aik, 2009). A element cannot be further broken down chemically, wile a compound can be broken down into individual components or elements using chemical reactions specific for that compound. Fr example, hating mercuric oxide, wich is a compound, oer a Bunsen flame, wll result in the decomposition and separation of mercuric oxide into mercury and oxygen. Hwever, mrcury and oxygen, wich are elements, cnnot be further broken down using any chemical means Aik, 2009).

Terefore, i order to tell whether a given pure compound is an element or a compound, i will be subjected to various separation procedures to determine if it can be broken down further. Is melting and boiling points and other physical and chemical properties will also be noted and compared with those of preexisting elements and compounds for ease of identification. Inic bond is formed when electrons are transferred from one atom to another. Te transfer of electrons results in the formation of a positive and a that are held together by strong electrostatic attraction.

Fr example, slt (NaCl) is formed when an electron from sodium (Na) is transferred to chlorine (Cl) to form ions (Na+ and Cl- ) that are held together to form salt (NaCl). Covalent bond is formed when an electron pair from the outer shell is shared between two atoms. Fr instance, Hdrochloric acid (HCl) is formed when an electron from hydrogen (H) and one from chlorine (Cl) is shared together forming a covalent bond (Ramsden, 2001). Bcause of the ionic of bonds, inic compounds conduct electricity and thus, tey are electrolytes.

O the other hand, cvalent compounds having covalent bonds are non-electrolytes (Ramsden, 2001). Bcause of the strong electrostatic attraction between positive and negative ions, inic bonds are generally very strong, rsulting in high melting and boiling points for the compound having these bonds. Cvalent bonds generally have low forces of attraction (Ramsden, 2001). Inic bonds are formed by the transfer of electrons from a donor atom to a recipient atom. Mtals at the left side of the table have and loosely held electrons in their outer shell and so, tey have a higher tendency to lose electrons, wile nonmetals at the right side of the periodic table have higher number of strongly held electrons in their outer shell. ..

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preview essay on Elements, Mixtures and Compounds
  • Pages: 4 (1000 words)
  • Document Type: Essay
  • Subject: Chemistry
  • Level: Masters
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