Organizing Elements: The Periodic Table

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The Periodic Table has been developed to be one of the easiest and most logical ways to view and organize elements. Atomic radius, ionization energy, and electron affinity all have patterns that are constant throughout the entire table. Also, the table efficiently organizes elements by many of their similarities. Some of the similarities that the table is organized by are their electrons, reactivity, and whether or not the element is a metal. Elements are ordered by increasing atomic number and the atomic mass increases as you move from left to right. The organization of the periodic table make it easy to find identify elements that you may not know the name of simply by following the different trends. The atomic radius, which is half the distance between the centers of two atoms of that element that are touching each other, decreases as you move across a period (left to right) and…show more content…
For example, all elements from a particular group have the same number of valence electrons, and the core electrons vary. The core electrons are the electrons from the inner energy levels (n), and the valence electrons are the electrons in the outermost energy lever (n value). The variable "n" is the overall size and energy of an orbital, and can be determined by the row number. The variable "l" is equal to n-1 and is the angular momentum quantum number which determines whether the the electrons fill the s, p, d, or f orbitals. The s orbitals are the first 2 groups of the periodic table, are filled with only 2 electrons, and have an l value of 0. The p orbitals are groups 13-18, fill up with 6 electrons, and have an l value of 1. The d orbitals are next and they are groups 3-12, fill up with 10 electrons, and have an l value of 2. Finally, the f orbitals are the rare earth metals found at the bottom of the periodic table and they fill with 14 electrons, and have an l value of

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