MSE Notes - Atomic Structure and Interatomic Bonding.docx

3 Pages
49 Views
Unlock Document

Department
Materials Science & Engineering
Course
MSE101H1
Professor
Scott Ramsay
Semester
Spring

Description
Atomic Structure and Interatomic Bonding Fundamental Concepts  Atomic number (Z) – number of protons  Atomic mass (A) – sum of masses of protons and neutrons within nucleus  Atomic weight – weighted average of the atomic masses of an atom’s naturally occurring  isotopes  Bohr atomic model – electrons assumed to revolve around atomic nucleus in discrete  orbitals. Wavicle model was later adopted (lol visit dennismercier.com)  Principal quantum number (n) – shell of electron (n = 1,2,3,4…)  Angular quantum number (l) ­ shape of the orbital Magnetic quantum number (m) ­ nulber of orbitals and their orientation within a  subshell Electron spin quantum number (m ) ­ sesignates the direction of the electron spin and  may have a spin of +1/2, represented by↑, or –1/2, represented by ↓ Bonding Forces and Energies  Primary Interatomic Bonds  Ionic Bonding  −A For attractive energy: E A r For repulsive energy:  E R Bn r Covalent Bonding  ­sharing of electrons between adjacent atoms  ­covalent bond is directional  2 ioniccharacter= 1{exp − [.25 X −( A B)]}×100 Metallic Bonding  ­valence electrons form an electron cloud  ­remaining non­valence electrons and atomic nuclei form ion cores, which posses a net  positive charge equal in magnitude to total valence electron charge per atom  ­non­directional: free electrons sh
More Less

Related notes for MSE101H1

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit