Respuesta :

gmany
[tex]\dfrac{3.4\cdot10^{-25}}{1.7\cdot10^{-27}}=\dfrac{3.4}{1.7}\cdot10^{-25-(-27)}\\\\=2\cdot10^{-25+27}=2\cdot10^2=2\cdot100=200[/tex]
A lead atom has about 200 times more mass.

Used:
[tex]\dfrac{a^n}{a^m}=a^{n-m}[/tex]