Flashcards
Module 2: Atomic Structure & Microstructure
Cards in this deck (10)
- 1ElectropositiveAtoms that wants to lose electrons
- 2IonAtom with net electric charge (loss or gain of an electron)
- 3Covalent bondBond between two non-metals that involves sharing pairs of electrons
- 4Polar bondA covalent bond where valence electrons end up unevenly distributed, forming a dipole (slight + and - charges on either end of molecule)
- 5Van der Waal forcesElectrons naturally change places (like sloshing around in the atom), and if an atom approaches, they start to slosh together
- 6Electrons in a metalThey're free to roam around the entire metal!
- 7Unit cellSmallest number of atoms required to form the crystal lattice (structure) of a metal
- 8List point defectsVacancy, Interstitial, Substitutional defect
- 9Interstitial defectForeign atom of small size compared to other atoms
- 10Solidification process (steps)1. as molten metal reaches solidification temp., solid nuclei form. Unit cell begins to form.
2. Nuclei grow as more and more atoms attach to lattice
3. Dendrites grow
4. Become almost spherical grains
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- MEC1201 Materials Engineering Flashcards on Module 2: Atomic Structure & Microstructure, created by Kyan Clay on 08/03/2016.
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- Kyan Clay
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