Biomaterials Flashcards
1
Q
What are the three major types of bonding?
A
- Ionic
- Covalent
- Metallic
2
Q
What is an ionic bond?
A
- Between atoms with large eletronegativity differences (greater than 2.0).
- Bonds based on charge attraction
- Bonds non-directional
- Charges must balance
- Repulsive energy between like charges make materials brittle.
~ commonly in ceramic materials - 50 - 1000 kJ/mole
3
Q
What is a covalent bond?
A
- # of covalent bonds depends on # valence e-sā
- Special cases of hybridization
- C = 2s2, 2p2 -> sp3
