Answer to Question #286873 in Chemistry for michelle

Question

Identify the atom with electron configuration [Kr] 5s²4d² 

1. Sn
2. Ti
3. Zr
4. Tc
5. Sr

Answer 1

Solution:

1) Sn (tin): [Kr] 4d¹⁰5s²5p²

2) Ti (titanium): [Ar] 3d² 4s²

3) Zr (zirconium): [Kr] 4d² 5s²

4) Tc (technetium): [Kr] 4d⁵ 5s²

5) Sr (strontium): [Kr] 5s²

The atom with electron configuration [Kr]5s²4d² is zirconium (Zr).

Answer: 3. Zr