
- The Periodic Table was discovered by Dmitri Ivanovich Mendeleev,1869
- Modern Periodic Table was discovered by Henry Moseley
- Father of Periodic Table Dmitri Ivanovich Mendeleev
- Elements were classified on the basis of Atomic Volumes by Lother Meyer
- The Periodic table of Mendeleev was based on increasing order of Atomic Mass
- The Modern Periodic table of Moseley was based on increasing order of Atomic Number
- Law of Triads was put forward by Dobereiner
- Law of Octaves was put forward by John Newlands
- The Scientist who established measuring and weighing methods in Chemistry Lavoisier
- Horizontal Rows of elements in a periodic table is known as Periods
- Vertical Columns of elements in a periodic table is known as Groups
- The Last Natural Element in Periodic Table - Uranium
- The Natural element having Highest atomic weight and atomic number - Uranium
- The first Artificial Element - Technitium ( Atomic number : 43 )
- Element on Left side of the Periodic Table - Metals
- Element on Right side of the Periodic Table - Non Metals
- Group 1 Elements are called - Alkali Metals
- Group 2 Elements are called - Alkaline Earth Metals
- Elements with Atomic number 58 - 71 are known as Lanthanides ( Rare Metals )
- Elements with Atomic number 90 - 103 are known as Actinides ( Radioactive Rare Earths )
- Elements of Group 17 are called Halogens
- The elements present in 1 , 2 and 13-18 groups are known as Representative Elements
- The elements present in 3 - 12 groups are known as Transition Elements
- The Liquid metal at Room Temperature - Mercury
- The Liquid non metal at Room Temperature - Bromine
- The Elements used in the dials of Clock - Radium
- The metal which is used in Atomic Clocks - Caesium
- The Radioactive liquid Element -Francium
- The Radioactive gaseous Element - Radon
- The metal which shows least expansion - Caesium
- Element having the name of ‘ Sun ’ - Helium
- Element having the name of ‘ Earth ’ - Tellurium
- Element having the name of ‘ Moon’ - Selenium
- Element having the name of an ‘ Asteroid’ - Palladium
- First Asian Country to discover an element - Japan ( Element name : Nihonium )
For Our Free App : Mr PSC
No comments:
Post a Comment