Some of the isotopes of silicon are listed in the following table:
isotope | % Natural Abundance | Atomic Mass | Half-Life (radioactive) | Radiation |
| 26.987 | 4.9 s | Positron | |
92.23 | 27.977 | Stable | None | |
4.683 | 28.976 | Stable | None | |
30.087 | 29.974 | Stable | None | |
| 30.975 | 2.6 h | Beta |
a. In the following table, indicate the number of protons, neutrons, and electrons for each isotope listed:
isotope | number of protons | number of neutrons | number of Electrons |
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b. What are the electron configuration and the abbreviated electron configuration of silicon?
c. Calculate the atomic mass for silicon using the isotopes that have a natural abundance.
d. Write the balanced nuclear equations for the positron emission of Si-27 and the beta decay of Si-31.
e. Draw the electron-dot formula and predict the shape of SiCl4.
f. How many hours are needed for a sample of Si-31 with an activity of 16 μCi to decay to 2.0 μCi?
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