Ncert Exercises & Solutions

3.5 In terms of period and group where would you locate the element with Z =114?

Elements with atomic numbers from Z = 87 to Z = 114 are present in the 7th period of the

periodic table. Thus, the element with Z = 114 is present in the 7th period of the periodic

table.

In the 7th period, first two elements with Z = 87 and Z= 88 are s-block elements, the next

14 elements excluding Z = 89 i.e., those with Z = 90 – 103 are f – block elements, ten

elements with Z = 89 and Z = 104 – 112 are d – block elements, and the elements with

Z = 113 – 118 are p – block elements. Therefore, the element with Z = 114 is the second

p – block element in the 7th period. Thus, the element with Z = 114 is present in the 7th

period and 14th group of the periodic table