Tips and Trends Of The Periodic Table of the Elements

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Tips and Trends Of The Periodic Table of the Elements

Tips & Trends of The Periodic Table of the ElementsBy Michael SethEDT 180

Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smaller radius.Atomic radius increases from top to bottom within a group. This is caused by electron shielding.

The ionization energy of the elements within a period generally increases from left to right. This is due to valence shell stability.The ionization energy of the elements within a group generally decreases from top to bottom. This is due to electron shielding.

Electronegativity increases from left to right across a period of elements. If the valence shell of an atom is less than half full, it requires less energy to lose an electron than to gain one. Conversely, if the valence shell is more than half full, it is easier to pull an electron into the valence shell than to donate one.From top to bottom down a group, electronegativity decreases. This is because atomic number increases down a group, and thus there is an increased distance between the valence electrons and nucleus, or a greater atomic radius.

Click here for some cool facts about the Periodic Table

Electron affinity increases from left to right within a period. This is caused by the decrease in atomic radius.Electron affinity decreases from top to bottom within a group. This is caused by the increase in atomic radius.

Melting PointMetals generally possess a high melting point.Most non-metals possess low melting points.

Need some help memorizing the elements? Try the helpful and fun song above

[Periodic Table Melting Points] Frostburg. Retrieved 3/31/15 fromhttp://antoine.frostburg.edu/chem/senese/101/periodic/faq/melting-point-trend.shtml

[Trends In the Periodic Table] Tutor Vista. Retrieved 3/31/15 from http://www.tutorvista.com/chemistry/trends-in-the-periodic-table

[The New Periodic Table Song (In Order)] Youtube. Retrieved 3/31/15 from https://www.youtube.com/watch?v=zUDDiWtFtEM


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