Question

Material Science

For each of the material: Al, MgO, SiC and Polyethylene, predict the following properties

a)Strength(high, medium, or low)

b)Malleability(high, medium, or low)

c)Electricity conductivity (high, medium, or low)

d)Thermal conductivity(high, medium, or low)

Give specific reasons for each of the amswers, based on your understanding of the bonds in eah case.

Answer 1

Al is metal

Its strength is high; melleability is high; Electrical conductivity is high and thermal conductivity is high

MgO is an ionic compound

Its strength is low; melleability low; Electrical and thermal conductivity low

SiC is a ceramic material

Its strength is high; mellability is low; electrical conductivity low; thermal conductivity high

Polyethylene is a polymer

Its strength is medium; melleability medium; electrical conductivity and thermal conductivity low