The charge density of Copper (Cu) can be calculated using its atomic mass of 63.5 g/mol and a density of 8920 kg/m³. By converting the atomic mass to kilograms (1.0541 x 10^-25 kg) and dividing the density by this value, the number of atoms per cubic meter is determined to be approximately 8.46 x 10^28 m^-3. This value significantly exceeds the expected charge density of around 10^9, indicating a potential misunderstanding in the calculation or reference material.
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j-lee00 said:How do I work out the charge density of Copper Cu, if
atomic mass =63.5
Density = 8920 kgm^-3
Assume 1 electron per cu atom.
j-lee00 said:number of electrons per unit volume
j-lee00 said:To convert atomic mass to kg, I do
63.5 x 1.66^10-27 = 1.0541 x 10^-25kg
Then
8920 kgm^-3 / 1.0541 x 10^-25kg = 8.462195238 x10^28m^-3
but it should be around 10^9 says wikepedia?