Question

hii guys
how are you
give me note about modern periodic table​

Answer 1

Answer:

In modern periodic table there are eighteen vertical columns, comprising of groups and seven horizontal rows in the periodic table , each called a period

according to the recommendation of international union of pure and applied chemistry ( IUPAC) , the groups are numbered from 1 to 18 replacing the older notation of GROUPS IA.. VIIA, VIII, IB... VIIB, and 0. However, for the examination, both notations will be accepted.

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Answer 2

Answer:

Solution : In the modern periodic table, the elements are arranged in the order of their inreasing atomic number. In the modern periodic table there are seven horizontal rows called periods and eighteen vertical columns (1 to 18) called groups. The arrangement of the periods and groups results into formation of boxes.