Polonium was discovered by Marie Curie in 1898; she later named it for her homeland of Poland. Though rare, it is found in tobacco, and in the soil and air. For industrial purposes, it is produced in milligram amounts in nuclear reactors. Polonium-210 is a radioactive material that occurs in nature at very low levels resulting from the natural radioactive decay of uranium, which is commonly found in Sierra Nevada granites. Polonium-210 emits alpha particles, which makes it decay to form a stable isotope. a) What is the the stable Isotope that is formed when Polonium 210 undergoes alpha-decay?( include symbol for the new element with Mass # (superscript) and atomic number (subscript) b) Write out the equation that supports this decay. c). Describe the particle that is ejected in this decay and what can be used to block the emission of this particle.