Final answer:
The elements matching the provided electron configurations are Zinc (Zn) for a full 3d energy level, Nitrogen (N) with 3 electrons in the 2p level, Calcium (Ca) whose outer energy level is 4s², and Molybdenum (Mo) which contains 5 electrons in the 4d level.
Step-by-step explanation:
To answer the student's question about identifying elements based on their electron configurations:
- a. Contains a full 3d energy level: An element with a full 3d energy level would have the electron configuration 3d¹⁰, which corresponds to Zinc (Zn) with atomic number 30.
- b. Contains 3 electrons in the 2p level: An element with 3 electrons in the 2p level would have the electron configuration 1s² 2s² 2p³, which is Nitrogen (N) with atomic number 7.
- c. Outer energy level is 4s²: An element with an outer energy level of 4s² would be Calcium (Ca) with atomic number 20, as it has the electron configuration 1s² 2s² 2p¶ 3s² 3p¶ 4s².
- d. Contains 5 electrons in the 4d level: An element with 5 electrons in the 4d level would have the electron configuration ending in 4d⁵, which is Molybdenum (Mo) with atomic number 42.