equation 11. Magnesium-28 undergoes a beta negative decay according to the nuclear reaction A. Mg - 1Al+ ge+ ov B. 12 Mg - 13Al+ let C. 12 Mg - Nate+ ov D. 12Mg - Na+ de+ % 12. A physicist starts a 14.0 day experiment with 0.20 g of magnesium-28. If the half- life of magnesium-28 is 21 h, then the mass of magnesium-28 remaining at the end of the experiment will be A. 1.9 x 10 g B. 1.3 x 10-1 C. 7.8 x 104 g D. 3.1 x 106 g 13. If a Na nucleus decays to become a ? Ne nucleus, the two particles that would also be produced are A. a positron and a neutrino B. an electron and an antineutrino C. an electron and a neutrino D. a positron and an antineutrino ngor gvoda Use the following information to answer the next question In a piece of new wood, the radioactive decay of carbon-14 is 816 decays per hour per gram. The half-life for carbon-14 is approximately 5730 years. The decay rate of carbon-14 in a particular wooden archeological artifact is 25.5 decays per hour per gram. 14. The age of the wooden artifact is A. 2.86 x 10* years B. 3.44 x 104 years C. 1.83 x 10' years D. 2.29 x 104 years