Question

Given below are densities of some solids and liquids. Give rough estimates of the size of their atoms :
Substance
Carbon (diamond)
Gold
Nitrogen (liquid)
Lithium
Fluorine (liquid)

Atomic Mass
12.01
1997.00
14.01
6.94
19.00

Density (103 Kg m-3)
2.22
19.32
1.00
0.53
1.14

Answer 1

1. carbon(diamond) ⇒atomic mass (12.01) ⇒density (2.22 kg/m³)

diamond is the hardest matter. it is a allotrope of carbon. so, atomic mass of diamond must be 12.01. density of diamond is just lower than that of gold. and here gold has highest density.

so, density of diamond is 2.22.

2. Gold ⇒atomic mass(199.7) ⇒density (19.32 kg/m³)

Gold is the heaviest metal among them. so, density of gold is the highest. so, density and atomic mass both are largest. so, atomic mass 199.7 and density 19.32 kg/m³

3. Nitrogen ⇒atomic mass(14.01) ⇒density (1 kg/m³)

4. lithium ⇒atomic mass (6.94) ⇒density (0.53)

5. fluorine ⇒atomic mass (19.00) ⇒density (1.14)

here, lithium is lightest among all of them.so, atomic mass and density both will be lowest. so, atomic mass 6.94 and density 0.53.

atomic mass of Fluorine is higher than that of nitrogen so, atomic mass of nitrogen is 14.01 and density is 1.00 and atomic mass of Fluorine is 19.00 and density is 1.14