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The modern periodic table consists of ……………. horizontal periods and ……………. vertical groups.
7- 18
Groups of d-block take letter …………. except group …………. which consists of ……………. vertical column.
B - 8 - 3
The table in which elements are arranged according to their atomic number.
modern periodic table
Elements of group zero in the modern periodic table
noble gases
Elements of S- block are located on the ........ side of periodic table
left
