The half-life of Palladium-100 is 4 days. After 16 days a sample of Palladium-100 has been reduced to a mass of 4 mg . What was the initial mass (in mg ) of the sample? What is the mass (in mg ) 8 weeks after the start? You may enter the exact value or round to 4 decimal places.

(v) The strongest reducing agents are the elements of group: a. Six b. Seven .c. One d. Two

At the beginning of an experiment, a scientist has 172 grams of radioactive goo. After 60 minutes, her sample has decayed to 5.375 grams. What is the half-life of the goo in minutes? Find a formula for \( G(t) \), the amount of goo remaining at time \( t \). \( G(t)= \) How many grams of goo will remain after 20 minutes? You mav enter the exact value or round to 2 decimal places.

The half-life of Palladium-100 is 4 days. After 12 days a sample Palladium-100 has been reduced to a mass of 4 mg . What was the initial mass (in mg ) of the sample? What is the mass (in mg ) 6 weeks after the start?

(i) State Mendeleev's periodic law.

The half-life of Radium- 226 is 1590 years. If a sample contains 500 mg , how many mg will remain after 4000 years?