Calculating Copper Cu Charge Density

[j-lee00]

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.

 

[sjb-2812]

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.

Can you define charge density?

 

[j-lee00]

number of electrons per unit volume

 

[sjb-2812]

number of electrons per unit volume

OK, so assume, say 1m³. How many atoms of copper are there in this volume?

 

[j-lee00]

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?

 

[sjb-2812]

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?

Where does the 1.66 x 10^-27 come from? (does that have any units?)