Question

Estimate charge on all the electrons in a 10 gm cupper penny .

Answer 1

The number of atoms in given copper -

(6.023×1023 ×3.11)/63.5

Given, atomic number of copper =29

So, Each atom contains 29 protons and 29 electrons

So, the positive or negative charge on it=

±(6.023×1023 ×3.11)/63.5 ×29 ×1.6×10-19

= ± 1.37×105 C