Write two basic of mendeleev's periodic …

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Write two basic of mendeleev's periodic table. Please give me ans urgently

Posted by Khushi Anurag 5 years, 2 months ago

Yogita Ingle 5 years, 2 months ago

In Mendeleev periodic table, vertical columns in the periodic table and horizontal row in the periodic table were named as groups and period respectively.
The periodic table is composed of seven horizontal rows or periods and is numbered between 1 and 7.
There is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right.
The periodic table is composed of eight vertical columns or groups. They ‘re numbered between 1 to 8.
If the element is similar but not much, to distinguish between them it is placed below and slightly away from it. Thus, each column will have two sub-columns A and B, so elements will show more similarity in the same sub-columns.

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