We eliminate the lines from the orbital notation

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Write the “long hand” electron configuration for each element. We eliminate the lines from the orbital notation style and list the orbitals in increasing energies as follows: The coefficient is the principle quantum number (or the energy level), the letter represents the second quantum number or the sub-energy level, the superscript is the number of electron contained in the sub-energy level Ex) 1s 2 2s 2 2p 3 would be N Electron Configuration Notation: what the numbers represent 1. He_________________________________________________________________ 2. Mg_________________________________________________________________ 3. Ca +2 _________________________________________________________________ 4. O_________________________________________________________________ 5. S -2 _________________________________________________________________ Page 4 of 5
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Name____________________________ 6. Ne_________________________________________________________________ 7. Ar_________________________________________________________________ 8. Kr_________________________________________________________________ 9. N -3 _________________________________________________________________ 10. P_________________________________________________________________ 11. Li_________________________________________________________________ 12. Na_________________________________________________________________ 13. K +1 _________________________________________________________________ 14. Ti_________________________________________________________________ 15. Co_________________________________________________________________ Short-hand electron configuration- Use the noble gas of the last completed octet as the “base” and build up the orbitals from there: Put the base in brackets, Then similar to the longhand method build up the sub-energy levels Ex: [Ne] 3s 2 3p 2 would be silicon. 1. Mg_______________________ 2. O_______________________ 3. Cl_______________________ 4. K_______________________ 5. P -3 _______________________ 6. Mn_______________________ 7. Rb_______________________ 8. Al_______________________ 9. Ag +1 _______________________ 10. Zn +2 _______________________ Page 5 of 5
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