Question

The atomic number of non transition element of $6\text{d}$ series of ${}^{\prime }{d}^{\prime }$ block elements ____________.

• A. 112
• B. 111
• C. 110
• D. 80

Answer 1

The correct option is A 112

The elements which are in 'd' blockin the periodic table and contain all the elctrons filled in 'd' orbital are not treated as transition-elements. Here the element with atomic number 112 has 'd' orbital filled [6d${}^{10}$] . So it is not a transition element.