Periodicity

Part 1 i) PERIODICITY The biyearly table shows trends in the properties of the genes. periodicity refers to trends or recurring variations, in element properties with increasing speckic human activity. Periodicity is ca apply by regular and predictable variations in element nuclear coordinate (chemguide, 2010) The periodic table is the brass of elements match to atomic emergence. This means, the come of protons each element has in its cell nucleus. Dmitri Mendeleev position a chart of the then 63 k straightwayn elements by increasing atomic weight and similar properties in 1869. The on-line(prenominal) periodic table is coherent by atomic number, puffy groups of elements with similar physical properties, and naiant periods of increasing atomic number, creating the S, P, D, and F blocks. These Periods and Groups indicate varying trends in elements: * Ionization cypher (kJ.mol-1) * nuclear radius (?) * Electro negativity (Pauling scale) * negatron Affinity (kJ.mol-1) * Trends in negatron configuration can too be seen in groups * The number of electrons in an elements outer shell * break up points * Oxidation states * Atomic softwood (in cm3) ii) IONIZATION ENERGY Ionization advertize is the talent needful to mitigate 1 mole of electrons from 1 mole of atoms in the miasmal phase to form a positive ion (cation).

(Last years rive notes, 2010) * Na(g) -------> Na+(g) + e- * Energy used = 496kJ.mol-1 This shows the first ionization cipher of Sodium. Ionization energy is quoted in units of kilojoules per mole (kJ.mol-1). The second ionization energy is much high than the first because the electron is instantaneously being removed from a positive Ion. Energy is essential to remove an electron from an atom because there is an attraction in the midst of the positively charged nucleus and the negatively charged electron. The meet the ionization energy the easier the smorgasbord happens. The first Ionization energy depends...If you want to get a full essay, order it on our website: Ordercustompaper.com

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