Question

Which two elements on the periodic table are in the same period?

Responses
A Sn and RbSn and Rb
B F and ClF and Cl
C K and BaK and Ba
D Se and Te

Answer 1

To determine which two elements are in the same period, we can refer to their positions on the periodic table:

- **Sn (Tin)** is in Period 5.
- **Rb (Rubidium)** is in Period 5.

- **F (Fluorine)** is in Period 2.
- **Cl (Chlorine)** is in Period 3.

- **K (Potassium)** is in Period 4.
- **Ba (Barium)** is in Period 6.

- **Se (Selenium)** is in Period 4.
- **Te (Tellurium)** is in Period 5.

Based on this information, the correct answer is:

**A. Sn and Rb** - Both are in Period 5.