The Periodic Table Quick Check

To determine which element has the same number of electron shells as tungsten (W), we can refer to its position in the periodic table.

Tungsten (W) is located in period 6 of the periodic table, meaning it has 6 electron shells. We need to find another element that is also in period 6.

Here are the options you provided:

- Yttrium (Y) - Period 5
- Molybdenum (Mo) - Period 5
- Nickel (Ni) - Period 4
- Gold (Au) - Period 6

Since gold (Au) is also in period 6, it has the same number of electron shells as tungsten (W).

**Correct Answer: gold (Au)**