Ch. 1-4 Exam Review

Ch. 1-4 Exam Review - Material types Metal Alloys Crematics...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Material types Metal+ Alloys, Crematics + Glass, Semi-Conductors, Polymers, Composites Valence-Determined by the number of electrons in the outer most electron shell Atomic Number (Z) -number of protons in each atom Atomic Mass (A) -also called atomic weight, sum of the masses of protons and neutrons in the nucleus Avogadro’s Number (NA) 6.023 X 10 23 atoms/mole Electronegativity -The tendency of an atom to accept valence electrons, EN increases from left to right, bottom-top Primary Bonding- (electrons shared, transferred), Strong Ionic Bonding- Occurs between + and –ions, Requires electron transfer, Large difference in electronegativity  required,Example: NaCl Covelent bonding- Requires shared electrons, Example: CH4,Covalently bonded materials form specific bonding angles  depending on the material Metallic Bond - Arises from a sea of donated valence electrons(1, 2, or 3 from each atom), Valence electrons are not 
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ 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