Question

Characteristics of Mendeelev's Periodic Table.​

Answer 1

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• Mendeleev arranged all the 63 Known elements in increasing order of their atomic masses.
• The Table consists of vertical columns 'Groups' and horizontal rows Called 'Periods'.
• The elements with similar physical and chemical properties came under same groups.

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Answer 2

Answer:

Mendeleev's Periodic Table:

Mendeleev's periodic table is based on Mendeleev's periodic law. So, Mendeleev's periodic law states that the physical and chemical properties of elements are the periodic function of their atomic weight and mass.

Features of Mendeleev's periodic table:

• There are 63 elements are their in Mendeleev's periodic table. Noble gases are not discovered.
• All the elements were classified in Horizontal rows and vertical columns.
• Horizontal rows are called periods and their are seven periods in Mendeleev's periodic table.
• Vertical columns are called groups and their are 8 group in Mendeleev's periodic table.
• Each group upto 7th is divided into A & B subgroups 'A' sub groups elements are called normal elements and 'B' subgroup element are called transition elements.
• The 8th group consist of 9 elements.