JEE Main20206 Sep 2020Morning ShiftChemistryd and f Block ElementsActual
The set that contains atomic numbers of only transition elements, is :
Options
- A37,42,50,64
- B21,25,42,72
- C9,17,34,38
- D21,32,53,64
Correct answer
B. 21,25,42,72
Step-by-step solution
A transition element is defined as the one which has incompletely filled d orbitals in its ground state or in any one of the oxidation state. Z n ( z   =   30 ) ,   C d ( z   =   48 ) ,   H g ( z   =   80 ) are not transition element.