The elements belonging to the first transition series have atomic numbers from

Assertion : $Cr(VI)$ in the form of dichromate in acidic medium is a strong oxidising agent whereas $MoO_3$ and $WO_3$ are not.
Reason : $Mo(VI)$ and $W(VI)$ are found to be more stable than $Cr(VI)$.

In the ground state of cobalt atom $(Z = 27)$ there are $.......$ unpaired electrons and thus the atom is $.......$

Which one of the following ions exhibits the highest magnetic moment?

Which of the following elements are included in the fourth transition series?

Silver atom has completely filled $d$ orbitals $\left(4d^{10}\right)$ in its ground state. How can you say that it is a transition element?