Question

Excess electrons are placed on a small lead sphere with mass 8 g so that its net charge is -3.2010C
(i) find the number of excess electrons on the sphere.
(ii) How many excess electrons are there per
lead atom? The atomic number of lead is 82, and its atomic mass is 207g/mol.
karat) gold ring with mass 177 g Gold has an atomic mass of 197 amol and
24​

Answer 1

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