Think 24/7 Web Search

Search results

1. Results from the Think 24/7 Content Network

2. Periodic table - Wikipedia

   en.wikipedia.org/wiki/Periodic_table

   The periodic table is a tabular arrangement of the chemical elements, organized by their atomic number, electron configuration, and chemical properties. It is a useful tool for understanding the patterns and trends of the elements and their interactions. Learn more about the history, structure, and significance of the periodic table on Wikipedia.

3. List of chemical elements - Wikipedia

   en.wikipedia.org/wiki/List_of_chemical_elements

   Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.

4. History of the periodic table - Wikipedia

   en.wikipedia.org/wiki/History_of_the_periodic_table

   The periodic table is an arrangement of the chemical elements, structured by their atomic number, electron configuration and recurring chemical properties. In the basic form, elements are presented in order of increasing atomic number, in the reading sequence. Then, rows and columns are created by starting new rows and inserting blank cells, so ...

5. Period (periodic table) - Wikipedia

   en.wikipedia.org/wiki/Period_(periodic_table)

   In the periodic table of the elements, each numbered row is a period. A period on the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor. Arranged this way, elements in the same group (column ...

6. Chemical element - Wikipedia

   en.wikipedia.org/wiki/Chemical_element

   A chemical element is a chemical substance that cannot be broken down into other substances by chemical reactions. The basic particle that constitutes a chemical element is the atom. Elements are identified by the number of protons in their nucleus, [ 1] known as the element's atomic number. [ 2] For example, oxygen has an atomic number of 8 ...

7. Types of periodic tables - Wikipedia

   en.wikipedia.org/wiki/Types_of_periodic_tables

   Theodor Benfey's arrangement is an example of a continuous (spiral) table. First published in 1964, it explicitly showed the location of lanthanides and actinides.The elements form a two-dimensional spiral, starting from hydrogen, and folding their way around two peninsulas, the transition metals, and lanthanides and actinides.