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Explain the mendleef, Modern, Extended and long form in periodic class?

Explain the mendleef, Modern, Extended and long form in periodic class? 
 

Grade:11

1 Answers

Shrey Mahar
askIITians Faculty 58 Points
3 months ago
Hello dear student ,
Mendeleev’s periodic table is an arrangement of elements in an increasing atomic mass order in a table form, such that it reflects similarities and trends in the behavior of elements.

Mendeleev initially arranged elements, one below the other in the order of increasing atomic weight. Elements having similar properties are, placed nearby. Elements with similar properties are, found in the same horizontal row. Mendeleev’s original periodic table, published in 1869 is as follows.

Mendeleev’s periodic table can be understood better by reversing the of elements arrangement.

Here elements are, arranged in an increasing order atomic mass, in a horizontal line. This horizontal arrangement of elements is a ‘period’. When an element has high similarity to an earlier element, the new element is, placed just below the earlier element having similar property to start a new period and so on. The period’s one below the other form a ‘column’ (group). Thus, Mendeleev’s periodic table consists of horizontal rows and vertical columns or periods and groups respectively…

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