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| 1. |
Write two basic of mendeleev\'s periodic table. Please give me ans urgently |
| Answer» \tIn Mendeleev periodic table, vertical columns in the periodic table and horizontal row in the periodic table were named as groups and period respectively.\tThe periodic table is composed of seven horizontal rows or periods and is numbered between 1 and 7.\tThere is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right.\tThe periodic table is composed of eight vertical columns or groups.\xa0They ‘re numbered between 1 to 8.\tIf 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. | |