TG EAMCET 4 May 2025 Shift 1 Paper

The given atomic number 78 corresponds to the element platinum (Pt).
The electronic configuration of platinum is
Pt(Z=78)=[Xe]4f145d96s1
From the electronic configuration, the highest principal quantum number is 6 (from 6s1 ), so the period number x=6 For d block elements, the group number is obtained by adding the electrons that is present in the (n−1)d and ns-orbitals.
Here, 5d96s1,10 electrons
Hence, the group number y=10
Therefore, the sum x+y=6+10=16.