Question

Gold is denser than silver. Alcm cube of gold has more mass than a lcm cube
of silver.
However, if we could see the atoms of gold and silver, we would see that they
are exactly the same size. Alcm cube of gold has the same number of atoms as
a lcm cube of silver.
silver
gold
What does this tell you about the atoms of gold and silver?

Answer 1

Answer:

Explanation:

Atomic mass of gold is 197 g/mol. 1 mole of gold weighs 197 g.  1 mole of gold contains 6.023×10  

23

 atoms. Hence, 6.023×10  

23

 atoms of gold weighs 197 g. 1 atom of gold weighs  

6.023×10  

23

 atoms

197 g

​  

 

A fcc unit cell of gold contains 4 atoms.

The mass of the unit cell of gold = mass of 4 atoms of gold

=  

6.023×10  

23

 atoms

197 g

​  

×4 atoms=1.3×10  

−21

 g.

Convert the unit from g to Kg.

The mass of the unit cell of gold =1.3×10  

−21

 g×  

1000 g

1 kg

​  

=1.3×10  

−24

 Kg