PERIODIC TABLE

The periodic table is a rectangle that every one to day recognizes. This function of grouping the chemical elements was created by several European scientists; it all started in the 1860’s. In 1863, a French geologist, A. E. Béguyer de Chancourtois created a list of the elements in the periodic table and arranged the elements by increasing atomic weight. The list was wrapped around a cylinder so that sets of similar elements lined up, creating the first representation of the periodic table. In England, a chemist by the name of John A. R. Newlands was also wrapping the elements, noticing that the chemical groups repeated after every eight elements. He named this the octave rule, and compared it to a musical scale. His work was considered to be absurd, so his work was ignored for years. Chemists Dmitrii I. Mendeleev, a Russian, and German Lothar Meyer were working independently to arrange the elements into seven columns, corresponding to various chemical and physical properties. Then latter came the periodic table as of to

day to be what we see. Some of the parts of the modern periodic table are groups/families, and periods. There are many groups/families in the periodic table. The Alkali Metals are one of them. The Alkali Metals are the elements in Group IA of the periodic table. The members of the family are lithium, sodium, potassium, rubidium, cesium, and francium. All six elements have these properties the metals. Some of the prosperities are, they can be cut with a knife, they are the most reactive metals, they are so reactive that they are never found in nature, and they are always combined with other elements. Alkaline Earth Metals are beryllium, magnesium, calcium, strontium, barium, and radium. These elements have higher melting points and boiling points then the Alkali Metals. They are highly reactive, but not as much as the alkali metals.