Electron Configuration Practice Worksheet

In the space below, write the electron configurations of the following elements:

1) oxygen __________________________________________

2) sodium ________________________________________________

3) iron ________________________________________________

4) bromine ________________________________________________

5) chlorine ________________________________________________

6) argon ________________________________________________

7) cobalt ________________________________________________

8) silver ________________________________________________

Determine what elements are denoted by the following electron configurations:

9) 1s² 2s² 2p⁶ 3s² 3p⁴ ____________________

10) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰4p⁶ 5s¹ ____________________

11) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰4p⁶ 5s² 4d¹⁰5p³ ____________________

12) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰4p⁶ 5s² 4d¹⁰5p⁶ 6s² 4f¹⁴5d⁶ ____________________

13) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰4p⁶ 5s² 4d¹⁰5p⁶ 6s² ____________________

These electron configurations are NOT valid, determine what is wrong with them:

14) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4d¹⁰ 4p⁵ ____________________________________________

15) 1s² 2s² 2p⁶ 3s² 3d⁵ _____________________________________________________