N for s and p electrons period n for d electrons

This preview shows page 4 - 11 out of 24 pages.

n for s and p electrons = period # n for d electrons = period #-1 n for f electrons = period #-2
Image of page 4

Subscribe to view the full document.

Chem 1035 Chapter 8 5 of 24 Writing electron configurations: n-1s 1 – number of electrons in this orbital H: 1s 1 ^ C: 1s2 2s2 2p2 ^ ^ He: 1s 2 ^> N: 1s2 2s2 2p3 ^ ^ ^ Li: 1s2 2s1 ^> ^ O: 1s2 2s2 2p4 ^>^^ Be: 1s2 2s2 ^>^> F: 1s2 2s2 2p5 ^>^>^ B: 1s2 2s2 2p1 ^> ^> ^ Ne: 1s2 2s2 2p6 ^>^>^> Diamagnetic : Paramagnetic : No unpaired electrons At least one unpaired electron He, Be, Ne H, Li, B, C…
Image of page 5
Chem 1035 Chapter 8 6 of 24 Light color = 1e- in orbital Darker color = 2e- in orbital
Image of page 6

Subscribe to view the full document.

Chem 1035 Chapter 8 7 of 24 Na: [1s2 2s2 2p6] 3s1 K: [Ar] 4s1 Mg: [Ne] 3s2 Ca: [Ar] 4s2 Al: [Ne] 3s2 3p1 Sc: [Ar] 4s2 3d1 ^ Si: [Ne] 3s2 3p2 Ti: [Ar] 4s2 3d2 ^ ^ P: [Ne] 3s2 3p3 V: [Ar] 4s2 3d3 ^ ^ ^ S: [Ne} 3s2 3p4 Cr: [Ar] 4s1 3d5 ^ ^ ^ ^ ^ Cl: [Ne] 3s2 3p5 Mn: [Ar] 4s2 3d5 Ar:[Ne] 3s2 3p6 Fe: [Ar] 4s2 3d6 Co: [Ar] 4s2 3d7 Ni: [Ar] 4s2 3d8
Image of page 7
Chem 1035 Chapter 8 8 of 24 Cu: [Ar] 4s1 3d10 Zn: [Ar] 4s2 3d10 Ga: [Ar] 4s2 3d10 4p1 Ge: [Ar] 4s2 3d10 4p2 As:[Ar]4s2 3d10 4p3 Se: [Ar] 4s2 3d10 4p4 Br:[Ar] 4s2 3d10 4p5 Kr:[Ar] 4s2 3d10 4p6
Image of page 8

Subscribe to view the full document.

Chem 1035 Chapter 8 9 of 24 Example Problem : (a) Use the periodic table to determine the electron configurations of the following atoms. (b) Specify the number of unpaired electrons. (1) Al 13e- [Ne] 3s2 3p1 1 unpaired electron (2) Sb 51e- [Kr] 5s2 4d10 5p3 3 unpaired electrons (3) Os 76e- [Xe] 6s2 4f14 5d6 4 unpaired electrons
Image of page 9
Chem 1035 Chapter 8 10 of 24 Trends in Outer Electron Configuration: Inner (core) electrons: All electrons in a noble gas configuration and any complete d orbitals NEVER involved in reactions Outer electrons: All electrons with the highest n values Valence electrons: The electrons involved in reactions
Image of page 10

Subscribe to view the full document.

Image of page 11

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern