d) bromine (VII) and oxygen: __ 5. Which three of the following elements have atoms with four energy levels in their ground state? 1) Zn 2) P 3) As 4) F 5) K

The correct answer is 1) Zn, 3) As, and 5) K.Explanation:1) Zinc (Zn) has an atomic number of 30, which means it has 30 protons in its nucleus. The electron configuration of zinc is [Ar] 3d10 4s2, indicating that it has electrons in the 4s and 3d energy levels. Therefore, zinc has four energy levels in its ground state.3) Arsenic (As) has an atomic number of 33, which means it has 33 protons in its nucleus. The electron configuration of arsenic is [Ar] 3d10 4s2 4p3, indicating that it has electrons in the 4s and 4p energy levels. Therefore, arsenic has four energy levels in its ground state.5) Potassium (K) has an atomic number of 19, which means it has 19 protons in its nucleus. The electron configuration of potassium is [Ar] 4s1, indicating that it has electrons in the 4s energy level. Therefore, potassium has four energy levels in its ground state.On the other hand, phosphorus (P) has an atomic number of 15, which means it has 15 protons in its nucleus. The electron configuration of phosphorus is [Ne] 3s2 3p3, indicating that it has electrons in the 3s and 3p energy levels. Therefore, phosphorus has three energy levels in its ground state, not four.Therefore, the three elements that have atoms with four energy levels in their ground state are zinc (Zn), arsenic (As), and potassium (K).