The electronic configuration of an element is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p². What is the atomic number of the element, which is just below the above element in the periodic table?
- A36
- B49
- C50
- D54
✓ Correct answer: C
Want the full step-by-step reasoning?