Chapter 3 Physical Properties of Dental Material
1. ______ occurs when 2 atoms share electrons in their outer
shell, creating full shells for both: Covalent
2. Very strong bonds, ________ a good example of a strong
covalent bond: it is hard and a ________ melting point.:
Diamond & high
3. There are no transfer or sharing of electrons that occur with
__________
_____.This weakness often leads to deformation or fracture.:
Primary bonds 4. _________ have the strongest attraction
between atoms and molecules and have both shape and
volume.: Solids
5. A _______ has volume but no shape.: Liquid
6. A ________ has either definite shape nor volume.: Gas
7. If molecules of a solid are arranged in a random form with
no regular pattern, the solid would be described as:
Amorphous
, 8. The most stable solids have a regular ____________
___________ with molecules in a regularly spaced pattern.:
Crystalline structure
9. ___________ and __________ are the 2 of the hardest
materials and are more resistant to being scratched than
is cementum on the root or composite resins or gold
crowns.: Enamel & porcelain
10. The _________ materials have a high modulus of
elasticity.: enamel
11. The maximum amount of stress a material can withstand
without breaking
Is known as the ____________?: Ultimate strength
12. Combination of _________ and ________ is the ability of
the material to resist fracture.: Malleability & Ductility
13. In most cases, metals tend to be _________ and _________
and ceramic tend to be brittle.: Ductile and malleable
1. ______ occurs when 2 atoms share electrons in their outer
shell, creating full shells for both: Covalent
2. Very strong bonds, ________ a good example of a strong
covalent bond: it is hard and a ________ melting point.:
Diamond & high
3. There are no transfer or sharing of electrons that occur with
__________
_____.This weakness often leads to deformation or fracture.:
Primary bonds 4. _________ have the strongest attraction
between atoms and molecules and have both shape and
volume.: Solids
5. A _______ has volume but no shape.: Liquid
6. A ________ has either definite shape nor volume.: Gas
7. If molecules of a solid are arranged in a random form with
no regular pattern, the solid would be described as:
Amorphous
, 8. The most stable solids have a regular ____________
___________ with molecules in a regularly spaced pattern.:
Crystalline structure
9. ___________ and __________ are the 2 of the hardest
materials and are more resistant to being scratched than
is cementum on the root or composite resins or gold
crowns.: Enamel & porcelain
10. The _________ materials have a high modulus of
elasticity.: enamel
11. The maximum amount of stress a material can withstand
without breaking
Is known as the ____________?: Ultimate strength
12. Combination of _________ and ________ is the ability of
the material to resist fracture.: Malleability & Ductility
13. In most cases, metals tend to be _________ and _________
and ceramic tend to be brittle.: Ductile and malleable
