Periodic Table

Sunday, August 16, 2009 Periodic Table Essay The hebdomadal wander over is a table in which totally of the cognize elements atomic number 18 listed. The table arranges the elements in post of budge magnitude proton number to utter the correspondingities of chemical elements. Therefore elements with geomorphological similarities & atomic number ar placed together. These elements can be placed into two incompatible categories, metals & non-metals. These elements can then be sub divided into 4 groups; Alkali, non-metals, transition & inner-transitions. If tell horizontally the size of the atoms increases from metals to non-metals, yet when file vertically, all of the elements in the resembling group have the comparable number of electrons, which means they all behave in the same bearing. The first man to draw off the oscillatory table was Dmitri Ivanovich Mendeleev, whom was concerned in chemistry. Mendeleev was determine to launch that elements in fact followed real embodiments. Mendeleev apply the properties of the 57 known elements to group them. He used the first version of the periodic table to place elements where they seemed to belong. He also left blank space spaces in the appropriate squ ars. afterward the elements had been laid out he was able to, in detail, counter the chemical & physical tendencies of the elements. atomic number 1 didnt fit into his pattern so he put it in a thump of its own. A saucily row was started each measure an element was discovered with properties similar to those in the first row. When engage top to bottom thither are various similarities to be found in the table, identicalas to when read left to right. This is the basis for the innovational periodical table. The elements in the periodic table are ordered in a manner that places them in order of increasing proton number in Groups which are the columns, & Periods which are the rows. There are 8 groups of electrons; each named by t he number of electrons inside the outer(a) s! hell of the atoms of the elements of that group. Groups 2 & 3 are the transition metals group....If you wishing to get a full essay, order it on our website: BestEssayCheap.com

If you want to get a full essay, visit our page: cheap essay