Final answer:
The nuclide resulting from alpha decay by the ²⁸₁₄Si nucleus is 24Mg with atomic number 12 and mass number 24.
Step-by-step explanation:
The nuclide resulting from alpha decay by the ²⁸₁₄Si nucleus will be 24Mg with atomic number 12 and mass number 24. This is because during alpha decay, an alpha particle is emitted from the nucleus, which consists of 2 protons and 2 neutrons. Therefore, the resulting nuclide will have an atomic number 2 less than the original nucleus and a mass number 4 less than the original nucleus.