12/6 SISTER NIVEDITA ROAD,THAKURPUKUR
Thakurpukur, Kolkata, India- 700063. .
"What is periodicity? What are periodic properties?" in Class XI-XII Tuition (PUC)
In studying the characteristics of various elements, the early chemists started to list various properties. John Dalton devised a means to determine a relative mass for the atoms of the elements. This would later allow us to arrange the elements in a table. This table, initially set up by the Russian scientist Dmitri Mendeleev, is the single most important tool of chemists everywhere in the world. In about 1868, Mendeleev arranged the 60 elements he knew of at the time in order of each element's increasing mass. This showed him a repeating pattern of other characteristics of the elements. The tendency to show a regular repeating pattern is known as periodicity. The elements in the periodic table are arranged in order of increasing atomic number. All of these elements display several other trends and we can use the periodic law and table formation to predict their chemical, physical, and atomic properties.