Question

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

Class XI Classification of Elements and Periodicity in Properties Page 93

Answer 1

electronic configuration of ₁₁₄Z = ₈₆[Rn] 7s², 5f¹⁴, 6d¹⁰ ,7p²
last electron enters n = 7 { principal quantum number= 7} hence, elements locates in 7th period .

last electron enters in p- subshell hence, element Z locates in p- block .
we know, for P - block elements,
Group number = 10 + number of electrons in valance shell = 10 + 2{ of 7s²} + 2{ of 7p²}
= 14 hence, 14th group .

hence , element Z locates in 7th period and 14th group.