The Periodic Table offers basic information about each one of the known chemical elements. Each element has its own box in the table, and these boxes include the element's atomic number, atomic weight and chemical symbol. An element's position on the table indicates which elements share its basic properties.Continue Reading
The Periodic Table is organized according to atomic number, which is equal to the number of protons found in the nuclei of an element's atoms. The rows on the table are known as periods, and the columns are known as groups. Elements in certain groups tend to share characteristics. For example, elements in Group 1, including lithium, sodium and potassium, are known as the alkali metals. They tend to lose electrons, forming positive ions. Elements in Group 18, including helium and neon, are known as the noble gases and tend to be inert or non-reactive.
An element's position in the table tells a lot about its properties. Elements on the left side of the table are mostly metals, and they all share certain characteristics, such as high melting points and the ability to conduct electricity. Elements on the right of the table are non-metals, which tend to form negative ions and lack a lustrous sheen. Those in the middle are known as semi-metals, displaying characteristics of both metals and non-metals.Learn more about Atoms & Molecules
In the modern periodic table, elements are arranged by atomic number. They are placed with the lowest atomic number first, and elements with increasing atomic numbers run to the right. They are also arranged in vertical columns known as groups, with these groupings based on shared properties.Full Answer >
As of 2015, periodic tables of the elements can be downloaded from Los Alamos National Laboratory, Science Geek and WebElements. All three offer downloads in PDF format.Full Answer >
Co in the periodic table of elements is cobalt. Located in group nine, period four of the periodic table, this transition metal has an atomic number of 27 and an atomic weight of 58.9. It is a hard element that appears bluish-gray in color.Full Answer >
Mendeleev arranged the periodic table in order of increasing atomic weight of the elements. He determined that there was a pattern when he arranged these elements into horizontal rows.Full Answer >