Periodic+Table

The periodic table of elements is separated into groups (columns) and Periods (rows), separated by metals, non-metals, and metalloids. Metals are located on the left side of the periodic table. They are usually shiny and dense. They are corrosive, pliable, and melt at high temperatures. They are good conductors, meaning heat and electricity travel through metals easily. Nonmetals are on the right side of the table. They have properties that are the opposite of metals: they are dull, brittle, melt at low temperatures, and are relatively bad conductors. Metalloids are the diagonal purple line of elements shown in this table. They are those elements that exhibit properties of both or either metals and metalloids. However, they are not quite as good conductors as metals. The row at the bottom of the periodic table of elements is all man man metals that most of them are not able to stay chemically bonded long enough to do anything efficient with them. Because of this many of these elements on the bottom are not actually used for anything other than being proved they can be created even if they only stay intact for a couple of moments long enough to call it a success.

The very first periodic table, similar to what we have today, was created by scientist Dmitri Mendeleev in 1869.

The current periodic table has the elements lined up in increasing atomic number, and also lined up so that elements which exhibit similar properties are arranged in the same row/column as one another. One interesting fact about the two periodic tables is that the Mendeleev model had the elements ordered by increasing atomic weight, where as the new one is ordered by increasing atomic number.

The periodic table of the elements contains a wide variety of information such as element symbols, atomic number and atomic mass is most common, but the periodic table can contain even more data than previously expected. This will show you how to use a periodic table to gather information about the elements. The periodic table contains informative cells for each element arranged by increasing atomic number and chemical properties. Each element's cell typically contains: The horizontal rows are called periods. Each period indicates the highest energy level the electrons of that element occupies at its ground state. The vertical columns are called groups. Each element in a group has the same number of valence electrons and typically behave in a similar manner when bonding with other elements. The bottom two rows, the lanthanides and actinides all belong to the 3B group and are listed separately.
 * The element's symbol. Symbols are the abbreviations of the element's name. In some cases, the abbreviation comes from the element's Latin name.
 * The element's [|atomic number]. This number is the number of protons an atom of this element contains. The number of protons is the deciding factor when distinguishing one element from another.
 * The element's [|atomic mass]in atomic mass units. This number is a weighted average mass of the element's isotopes.
 * The element's name. Many periodic tables will include the name to help those who may not remember all the symbols for elements.