Naturally occurring silicon has an atomic mass of 28.086 and consists of three isotopes. The major isotope is 28Si , natural abundance 92.23%, relative atomic mass 27.97693. The next most abundant isotope is 29Si , relative atomic mass 28.97649. The third isotope is 30Si whose natural abundance is in the ratio of 0.6592 to that of 29Si.
Find the relative atomic mass of 30Si

Question

Naturally occurring silicon has an atomic mass of 28.086 and consists of three isotopes. The major isotope is 28Si , natural abundance 92.23%, relative atomic mass 27.97693. The next most abundant isotope is 29Si , relative atomic mass 28.97649. The third isotope is 30Si whose natural abundance is in the ratio of 0.6592 to that of 29Si.
Find the relative atomic mass of 30Si

aaronq · Answer

Apply:  $Atomic\;Mass_{relative}=\Sigma(mass_{isotopeA}*\%\;Abundance_{isotope A})$