1. The problem statement, all variables and given/known data In the long form of periodic table, the valence shell electronic configuration of 5s2 5p4 corresponds to the element present in A. Group 16 and period 5 B. Group 17 and period 6 C. Group 17 and period 5 D. Group 16 and period 6 2. Relevant equations NA 3. The attempt at a solution I know in normal periodic table 5s2 5 p4 corresponds to tellurium which is in group 16 and period 5. Don't know why the answer is group 17 and period 6 ? I think the long form of periodic table is same as normal periodic table.