b. A student has an 80 g sample of a radioactive material that has a half-life of 20 seconds. How much material will he have left after one minute? c. Given the periodic table below, write a beta decay equation for the transmutation of a radioactive isotope of Rutherfordium, which has 104 protons and 183 neutrons. Periodic Table of Eleme tra esde noa 1 2 3 4 5 7 9 10 11 12 13 14 15 16 17 18 1H Symbol Sold Nonmetals Metals

b. A student has an 80 g sample of a radioactive material that has a half-life of 20 seconds. How much material will he have left after one minute? c. Given the periodic table below, write a beta decay equation for the transmutation of a radioactive isotope of Rutherfordium, which has 104 protons and 183 neutrons. Periodic Table of Eleme tra esde noa 1 2 3 4 5 7 9 10 11 12 13 14 15 16 17 18 1H Symbol Sold Nonmetals Metals