Final answer:
Three elements that have the same number of energy levels as potassium, which is located in period 4 of the Periodic Table, are calcium (Ca), scandium (Sc), and titanium (Ti). These elements have their highest energy electrons at the fourth energy level, just like potassium.
Step-by-step explanation:
To identify three elements that have the same number of energy levels as potassium, we look at elements in the same period on the Periodic Table. Since potassium (K) is located in period 4, we need to find other elements from this period as they will also have four energy levels. Three such elements are:
These elements have electron configurations that start with the filling of the 4s sublevel, similar to potassium, indicating they have the same number of energy levels.