Atomic mass of Silicon would be 28.0855 amu.
Atomic Mass- The mass of each isotope is multiplied by its abundance to produce the atomic mass, which is a weighted average of all the isotopes of that element. (Atomic mass is also known as atomic weight, however "mass" is a more precise phrase.)
Abudance (²⁸Si) = 92.23%
(0.9223); (²⁹Si) = 4.67% (0.0467);
and (³⁰Si) 3.10% (0.031)
Atoms with the same atomic number but varying atomic masses are known as isotopes. The only difference between identical chemical element atoms of various isotopes is the amount of neutrons in the nucleus.
Isotopic mass of ²⁸Si is 27.967927 amu.
Isotopic mass of ²⁹Si is 28.976495 amu.
Isotopic mass of ³⁰Si is 29.973770 amu.
When calculated as ⇒(27.976927 x 92.23) + (28.976495 x 4.67) + (29.973770 x 3.10)/100.
The Atomic mass (Si) will be equal to 28.0855 amu.
Hence, the atomic mass of Silicon would be- 28.0855 amu
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