Kerja Lab Lanjut Quiz 1

The melting points of metals are __, but they deform at __ degrees C.

• moderately high; 25

• zero; 100

• infinite; 6000

• very high; 100

Metals have primarily __ bonding.

• covalent

• metallic

• ionic

• van der Waals

Thermoplastic polymers have __ bonding.

• only 1-D covalent

• only 1-D van der Waals

• 1-D covalent + van der Waals

• 1-D metallic

The mechanical properties of polymers include __, __, __ and __.

• conductivity; ductility; low strength; low density

• flexibility; low carrier concentrations; low strength; high density

• flexibility; high carrier concentrations; high strength; low density

• flexibility; ductility; low strength; low density

The thermal properties of polymers include __ thermal __.

• good; conductivity

• good; insulation

• poor; insulation

• good; carrier-concentrations

The electrical properties of polymers include __ electrical __.

• good; conductivity

• poor; insulation

• good; carrier-concentrations

• good; insulation

The melting points of polymers are typically __.

• low

• zero

• infinite

• greater than 600 degrees C

Ceramics have primarily __ bonding.

• metallic

• ceramical

• ionic or covalent

• only ionic

The mechanical properties of ceramics include __, __ and __.

• conductivity; strength in compression; brittleness in tension

• stiffness; high carrier concentrations; brittleness in tension

• stiffness; low carrier concentrations; brittleness in tension

• stiffness; strength in compression; brittleness in tension

The thermal properties of ceramics include __ thermal __.

• good; conductivity

• good; insulation

• poor; insulation

• good; carrier-concentrations