Use the information provided below to answer the questions.
The isotope lead-208 (208Pb):
g/mol
The isotope strontium-87 (87sr):
g/mol
DONE

208 g/mol and 87 g/mol

Explanation:

Number of protons = 82

Atomic mass = 126 + 82 = 208 g/mol

For ^{87}Sr

Number of neutrons = 49

Number of protons = 38

Atomic Mass = 49 + 38 = 87 g/mol