Silicon,which Makes Up About 25% of Earth's Crust by Mass,is

question 61

Multiple Choice

Silicon,which makes up about 25% of Earth's crust by mass,is used widely in the modern electronics industry.It has three naturally occurring isotopes,²⁸Si,²⁹Si,and ³⁰Si.Calculate the atomic mass of silicon. Isotope
Isotopic Mass (amu)
Abudance %
²⁸Si
27) 976927
92) 22
²⁹Si
28) 976495
4) 69
³⁰Si
29) 973770
3) 09

• A)29.2252 amu
• B)28.9757 amu
• C)28.7260 amu
• D)28.0855 amu
• E)27.9801 amu