(L4) PERIODIC TABLE OF ELEMENTS

• John Jacobs Berzelius - introduced letters to symbolize symbols
• Dmitri Mendeleev - created the periodic table, organized elements by atomic weight, left gaps for undiscovered elements
• John Jacob Berzelius developed the table of atomic weights
• John Jacobs Berzelius is a Swedish chemist
• John Ndwlands is a British chemist
• John Newlands initiated the Law of Octaves
• Law of Octaves


  when elements are arranged in increasing atomic mass, the properties of every eighth element are similar to the first
• Julius Lothar Meryer & Dmitri Ivanovich Mendeleeve


  credited for the discovery of the periodic table
• Lothar Meyer is a German chemist
• Father of the Periodic Table


  Mendeleeve is known as the?
• March 6, 1869


  When did Mendeleeve present the first periodic table?
• Mendeleeve is a Russian chemist
• Hnery Moseley is a English chemist
• Henry Moseley studied the x-ray spectra of elements discovered that the atomic number closely corresponds to the nuclear charge of the atom
• Johann Dobeiner is a German chemist
• Johann Dobereiner recognized that group of elements with the same properties exists
• Dobeiner's Triads


  of 3 elements with the same physical and chemical properties are grouped and is arranged according to its increasing atomic number
• Periodic table 


  shows the arrangement of elements according to their chemical and physical properties.
• The latest version of the periodic table was arranged according to the increasing atomic numbers of the element.