Essay On The Periodic Table

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The periodic table is what all of the 118 elements are organized on. All of the elements are sorted in increasing atomic number. Dmitri Mendeleev made the periodic table in 1869 in a way that physical and chemical properties of each element would relate to others in the same period and group. This basically means that the elements repeat certain characteristics, and they are placed in this pattern on the periodic table. The periodic table begins with the element with the lowest atomic number, which is hydrogen, and ends with the elements with the highest atomic number, and in this order, Dmitri Mendeleev discovered the law of periodicity. There are many so called trends that the periodic table follows. One of the many trends is that electronegativity, The oxygen family got the name Chalcogens because chalcos in Greek means "ore formers" and all of the elements in this group can be found in copper ores. Just like the nitrogen in the nitrogen group, oxygen is the only gas, while the others are all solids. All of the elements in Group VIA have six valence electron, but still the smaller elements have more of a chance to form covalent bonds than the larger ones. This group follows the common trends on the periodic table just like the rest of the groups If two atoms of the same element form a bond together then the bonding pair of electrons will be found in the middle, but if there are two different elements, then the one with more electronegativity will draw the electron pair closer too it than the less electronegative element. The one with the electron pair closer to it will be more negative than the other element. The electronegativity increases as you go across the periodic table, and it decreases as you go down a group. None of the noble gases have any electronegativity because they do not form bonds, but the electronegativity increases to fluorine on the periodic table, so fluorine has the most electronegativity. The bonded pair of the electrons gravitate towards one of the elements because of the number of protons in the nucleus, the distance from the nucleus, or the amount of screening by the inner electrons. The element with the most electronegativity, fluorine, is 4.0 and the lowest, cesium and francium, is 0.7 on the Pauling scale. The man who created the Pauling scale was Linus Pauling. He believed that electronegativity was "the powers of an atom in a molecule to attract electrons to itself," which basically means that the more electronegativity then the more force of pulling electrons towards itself. After much experimenting, Pauling was the person to discover that fluorine 's electronegativity was 4,0, and

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