What is the product when Bismuth (symbol Bi, atomic number 83, and isotope with mass number of 214) emits an alpha particle? Give name or symbol of new element, its atomic number, and its mass number for full credit. Show all work to receive credit

You have 80 g of a radioisotope. If the half-life of this radioisotope is 4 days, how many grams will remain after 16 days? Must show work or reasoning for full credit

Which type of radiation (alpha, beta, or gamma) is represented by each of the following?

- the most penetrating type of radiation
- when this particle is emitted, an atom of carbon (atomic number 6) will change to an - atom of nitrogen (atomic number 7)
- helium nuclei
- releases an electron