Periodic Table

The periodic table was first developed in 1789 by Antoine Lavoisier who listed 33 known chemical elements. Since this date the table has been continually modified as new elements have been discovered, the last of which being ununquadium (114) and ununhexium (116) which were accepted in June 2011. The table now consists of 118 chemical elements, placed specifically in order to show trends. The organization of the table allows one to predict the properties of an element given its location in the table.

The known elements organised into groups based on properties, and ordered using atomic numbers. Groups are labeled from 1-18 starting on the left with group 1 and ending on the right with group 8. Group 1 contains the alkaline metals and hydrogen. Whereas group 8 holds the noble gases. Information that you can gain from the majority of periodic table is: atomic number, weight, and name and symbol. It should be noted that not all periodic tables will contain the information listed before. Some periodic tables may only give the symbol, and others may give more information, such as the states of the element is when at certain temperatures.