10 which two elements on the periodic table are in the same period ? a se and te b k and ba c sn and rb d f…
10 which two elements on the periodic table are in the same period ? a se and te b k and ba c sn and rb d f and cl
Answer
Explanation:
Step1: Recall period concept
Periods are horizontal rows on periodic table.
Step2: Check each option
- Option A: Se (selenium) is in period 4, Te (tellurium) is in period 5.
- Option B: K (potassium) is in period 4, Ba (barium) is in period 6.
- Option C: Sn (tin) and Rb (rubidium) are both in period 5.
- Option D: F (fluorine) is in period 2, Cl (chlorine) is in period 3.
Answer:
C. Sn and Rb