When an unstable magnesium nucleus undergoes alpha decay the nucleus formed is that of sodium neon magnesium aluminum or silicon?

Magnesium has 12 protons and 12 or so neutrons depending on the isotope. An alpha particle has 2 protons and 2 neutrons. So if magnesium loses 2 protons by shooting off an alpha particle, it will move 2 places down the Periodic Table and become neon. Neon has 10 protons.