merits of mendeleev's classification

Mendeleev's periodic table was one of the greatest achievements in Chemistry with some of its important contributions as follows: As the arrangements are classified into groups, it was very useful in studying and remembering the properties of a large number of elements in a systematic ..

Merits: - Mean deviation is easy to calculate. This measure is simple to understand. This can be calculated from any average. Its value is based upon all the (observations) items of the data. It is less affected by extreme observations. It gives us an idea about how the items are situated..

Merits: s is based on every item of the data. s takes care of both positive and negative deviation. Demerits: s is some what not easy to understand. The extreme values unduly affect s..

This process gives soda of much higher purity (99.5%). It is less expensive as the raw materials are cheap and CO 2 and NH 3 are recovered to be used again. Calcium chloride is the only waste is the solution and so no pollution problems. Formation of sodium bicarbonate as an intermedia..

In spite of the above advantages, Mendeleev's periodic table suffered defects as follo..

In spite of the above advantages, Mendeleev's periodic table suffered defects as follows: The position of hydrogen was not correctly defined. It was placed in group I although it resembles both the group I elements - the alkali metals and the group VII elements-the halogens, in their p..

In 1869, Mendeleev classified the then known 56 elements on the basis of their physical and chemical properties in the increasing order of the atomic masses, in the form of a table. Mendeleev had observed that properties of the elements orderly recur in a cyclic fashion. He fou..

Mendeleev's Periodic Law - Later, Mendeleev arranged the sixty-three elements known at that time in the increasing order of the atomic masses, in the form of a table called the Periodic Table. The periodic table further classified the elements by arranging the elements with simi..

Later, Mendeleev arranged the sixty-three elements known at that time in the increasing order of the atomic masses, in the form of a table called the Periodic Table. The periodic table further classified the elements by arranging the elements with similar properties together and separatin..