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| 1. |
Long form of periodic table |
| Answer» The modern or long form of the periodic table is based on the modern periodic law. The table is the arrangement of elements in increasing order of their atomic numbers. The modern periodic table is the present form of the periodic table. And it consists of 18 vertical columns and 7 horizontal rows.\xa0Modern Periodic TableGroups in the Modern Periodic Table\t\tGroups are the vertical columns in the modern or long form of the periodic table.\t\t\tThere are 18 groups in the periodic table.\t\t\tThese groups\xa0are numbered\xa0from 1 to 18.\t\t\tEach group consists of elements having the same outer shell electronic configuration.\t | |