Electron Configuration Practice Worksheet

Write the electron configurations using arrows of the following elements:

1)            Magnesium       ______________________________________________________

2)            Cobalt              ______________________________________________________

3)            Krypton           ______________________________________________________

4)            Beryllium          ______________________________________________________

5)            Scandium         ______________________________________________________

Write the electron configurations of the following elements:

6)            Nickel              ______________________________________________________

7)            Cadmium          ______________________________________________________

8)            Selenium           ______________________________________________________

9)            Strontium          ______________________________________________________

10)        Lithium ______________________________________________________

Determine what elements are denoted by the following electron configurations:

11)        1s²2s²2p⁶3s²3p⁵  ____________________

12)        1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²  _____________________

13)        [Kr] 5s²4d¹⁰5p⁴  ___________________

14)        [Xe] 6s²4f¹⁴5d⁷  ___________________

15)        [Rn] 7s²5f¹²  ___________________

Determine whether the following electron configurations are or are not valid:

16)        1s²2s²2p⁶3s²3p⁶4s²4d¹⁰4p⁶       __________________

17)        1s²2s²2p⁶3s³3d⁶                        _________________

18)        [Rn] 7s²5f⁹                                __________________

19)        [Xe]                                         __________________

20)       [Ne] 3p⁵ 3s²                             __________________