Question

15)

Common Metals
Name Melting Point Density (w/cm)
Zinc
419.53 °C 7.134
Nickel 1455°C 8.912
Copper 1084.62°C 8.96
Silver 961.78°C 10.501
Gold 1064.18°C 19.282
You are hired as a scrap metal dealer. A customer wants to sell you a piece of precious scrap metal. You know it is one of these
common metals. You slowly heat the metal and it melts at 962 °C. You also take the density of the metal and find it to be roughly
10.5 g/cm? What is the MOST LIKELY identity of the metal?
copper
A)
B
B)
gold
C)
silver
D)
zinc

Answer 1

The data given are

melting point density

Zinc 419.53 oC 7.134

Nickel 1455oC 8.912

Copper 1084.62oC 8.96

Silver 961.78oC 10.501

Gold 1064.18oC 19.282

density is the mass per unit volume. Melting point is determined by the intermolecular forces between particles in the solids.

We have been asked to find which cube weighs the most

density = mass/volume

when volume is constant for all the metals, then density is directly proportional to mass. Therefore metal with highest density has the highest mass.

from the given metals, metal with highest density is Gold.

correct answer is Gold.