1. If 8.8 mg of iodine-123 is used in an experiment, how many milligrams of iodine-123 should remain after 50 hours? Assuming that iodine-123 has a half-life of 10 hours.
2. Supply the missing reactant in the following nuclear reaction: ? 10. Supply the missing reactant in the following nuclear reaction: ? + 10e ? 5926Fe __________
3.Indicate whether the following solutions are acidic, basic or neutral:
[H3O]+= 4.21 x 10-6M