Chemical Properties

Periodicity of chemical properties| The main value of the day-after-day pin gobble up back is the ability to predict the chemical properties of an portion ground on its location on the table. It should be noted that the properties leave other than when moving steeply on the pillars of the table, than when moving horizontally along the lyrics.  Groups and periods:  * A assembly is a vertical column in the biannual table of the elements.  Groups be considered the most important manner of classifying the elements. In some sort outs, the elements have very similar properties and record a clear trend in properties down the group these groups tend to be given fruitless (unsystematic) names, e.g. the basis metals, alkaline earth metals, halogens and noble gases. Some other groups in the periodic table display fewer similarities and/or vertical trends (for theoretical account Groups 14 and 15), and these have no trivial names and are referred to simply b y their group numbers.  newfangled quantum mechanical theories of nuclear structure explain group trends by proposing that elements within the said(prenominal) group have the same negatron configurations in their valency shell, which is the most important factor in bill for their similar properties. Elements in the same group also tell patterns in their atomic radius, ionization naught, and electronegativity. From top to fundament in a group, the atomic radii of the elements increase. Since there are more fill up energy levels, electrons are found farther from the nucleus. From the top, each nonparallel element has a lower ionization energy because it is easier to wrap up an electron since the atoms are less tightly bound. Similarly, a group provide also see a top to bottom drop-off in electronegativity due to an increasing exceed amongst valence electrons and the nucleus.  * A period is a horizontal grade in the periodic table of the elements.  Although g roups are the most tops(predicate) acid wa! y of classifying elements, there are some regions of the periodic table...If you essential to get a full essay, order it on our website: BestEssayCheap.com

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