Question

What was mendeleevsnasis for classification of elements?

Answer 1

mentally was a Russian chemist he formulated periodic law and use it to correct properties of some already discovered elements and predict the properties of a element said to be discovered mentally also investigator the petroleum and helped to establish the first oil in Russia recognise the importance of Petroleum as a source of petrochemicals he is called as father of modern periodic table







in 1913 English physics Henry moseley through his x-ray experiment proved that the properties of element depends on the atomic number and not the atomic mass the modern periodic table was prepared by arranging elements in the increasing order of their atomic number the Modern Periodic Table is the extension of original Mendeleev periodic table and known as the long of the periodic table











The Mentalist classification of element is the chemical and physical properties of elements are periodic functions of the atomic numbers






in 1969 Russian chemistry mentally observed that the elements of the similar properties repeat the regular intervals when the elements are arranged in the order of their atomic masses based on this I proposed the law periodic which states that the physical and chemical properties of elements are the periodic function of their atomic masses arrange 56 elements known as according to periodiCity this was best known as the short form of periodic table






features of Mendeleev periodic table





it has eight vertical columns call groups and 7 original Rose called period each group has two subgroups A and B all the elements appearing in a group was found to have similar properties for the first time elements were classified in such a way that elements are similar properties are placed in the same groove it was noticed that certain elements could not be placed in the air proper groups in this the reason for this was wrongly determine atomic masses and consequently goes wrong atomic masses where character example the atomic mass of beryllium was known to be 14 hey research as 9 place in the in the proper place left for elements which were not know at that time and their properties are so that predictor this give motivation to experiment in chemistry



limitation






elements with large difference in properties are included in the same groove Metal Slug copper and silver include along with the shop metal like Sodium and potassium no proper position could be given to the element and closer non metallic hydrogen was placed along with the metals like potassium Sodium and potassium order for the in the periodic table