RRB Group D 17-Sep-2018 Shift 2 Solved Paper

The atoms of Germanium, Arsenic, Selenium and Bromine contain 4 shells.
Germanium is in the same family with the elements carbon and silicon . They all have four electrons in their outer shell.
The orbital structure for germanium is 2-8 -18-4. Arsenic is found in the fourth period of the table of elements