Periodic Table

Anjam Naz The period Periodic Patterns- Review Describe the structure and layout of the yearly Table, and attain and explain, the general trends that argon observed on traverse periods and come down collections. The bimonthly put off is one of the near important interpersonal chemistry references, It arranges all the known ingredients in an informative and organized office The rows of the periodic accede of cistrons are called periods, and the tugs are called groups. Each blow in the table represents an element by its chemical substance symbol, along with its instalmentic upshot and its clean atomic mass in atomic mass units. The periodic table is arranged by increasing atomic numbers-the number of protons an element contains. (3,7) There are 112 known elements, of which about 90 occur naturally on Earth. Uranium, with an atomic number of 92, was the prevail naturally occurring element discover and elements with atomic numbers higher(prenominal) than 92 are man-made. The chemical symbols in the periodic table are one- garner or cardinal lettered abbreviations symbols e.g C for Carbon and He for helium. The first letter is endlessly a capital letter, and the second is always in lowercase. Sometimes the two-letter symbols propose the first and second letters of the elements name, however this is not always the case platinum is Pt.

Elements 110 by 112 give even to be named and so are granted the three-letter symbols Uun, Uuu, and Uub. (4) The periodic table has seven rows called periods and 18 columns. The columns are throw away together in terms of the eleme nt family. Hydrogen, even though it is a non! -metal, and alkali metals are elements of group I, these elements usually have +1 charge in compounds. Each oxygen atom combines with two atoms of elements in Group 1. Alkaline earth metals are elements of group 2. These elements usually have +2 charge in compounds and apiece atom of oxygen combines with one atom of each element in Group 2. Group 13 is the column including and infra boron. All of these elements combine...If you want to get a ripe essay, instal it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper