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Worksheet 11 . Topic 3

Set B: Electron configurations Objective: To test your ability to interpret electron configuration
Excited and Ground States

Electron configurations for six atoms are given. Complete information about each neutral atom on the
table .

Electron Total number Total Electron Excited or Atom’s
configuration of electrons number of shell with ground symbol
electron the highest state
shells
energy
5. electrons
Atom A 2 – 8 – 4

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6. Atom B 2 – 3 – 1

7. Atom C 2 – 8 – 7 – 1

8. Atom D 2 – 8 – 18 – 6

9. Atom E 2 – 8 – 18 – 17 – 5

10. Atom F 1- 7

Set C: Electron transition Objective: To test your ability to interpret electron transition in atoms

Below, electron transitions from one electron shell to another are given for four different atoms.
Answer questions 11 - 16 based on the electron transition in these atoms.

rd
th
th
nd
Atom G: 3 shell ----------------- > 2 shell Atom I: 4 shell-------------------- > 6 shell

st
th
th
rd
Atom H: 1 shell --------------- > 4 shell Atom J: 5 shell ------------------ > 3 shell

11. In which atom or atoms are energy absorbed during the electron transition?

12. In which atom or atoms are energy released during the electron transition?

13. In which atom or atoms are spectral lines observed?

14. In which atom is the greatest amount of energy absorbed?

15. In which atom is the greatest amount of energy released?
rd nd
16. In atom G, compare the energy of the electron in the 3 shell to that of the electron in the 2 shell.

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