Electron Configuration Practice Worksheet

Electron Configuration Practice Worksheet KEY
In the space below, write the unabbreviated electron configurations of the following elements:

1. 
   sodium 1s² 2s² 2p⁶ 3s¹
   

2) iron 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

3) bromine 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

4) barium 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s²

5) neptunium 1s² 2s²2p⁶3s²3p⁶4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² 5f⁵
In the space below, write the abbreviated electron configurations of the following elements:
6) cobalt [Ar] 4s²3d⁷
7) silver [Kr] 5s²4d⁹
8) tellurium [Kr] 5s²4d¹⁰5p⁴
9) radium [Rn] 7s²
10) lawrencium [Rn] 7s²5f¹⁴6d¹
Determine what elements are denoted by the following electron configurations:

11. 
    1s²2s²2p⁶3s²3p⁴ Sulfur
    

11. 
    1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s¹ Rubidium
    

11. 
    [Kr] 5s²4d¹⁰5p³ Antimony
    

11. 
    [Xe] 6s²4f¹⁴5d⁶ Osmium
    

11. 
    [Rn] 7s²5f¹¹ Einsteinium
    

Determine which of the following electron configurations are not valid:

11. 
    1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p⁵ should be 3d¹⁰
    

11. 
    1s²2s²2p⁶3s³3d⁵ 3s³ is impossible& “p” instead of “d”
    

11. 
    [Ra] 7s²5f⁸ Ra is not a noble gas
    

11. 
    [Kr] 5s²4d¹⁰5p⁵ Valid
    

11. 
    [Xe] Element can’t be its own electron configuration.