Final answer:
The amount of Zeldum left after 5 years can be calculated using the formula Amount left = Initial amount x (1/2)^(number of half-lives). Starting with 256 g of Zeldum, 8 grams of Zeldum are left after 5 years.
Step-by-step explanation:
The half-life of a substance is the amount of time it takes for half of the substance to decay. In this case, Zeldum has a half-life of 1 year. To calculate the amount of Zeldum left after 5 years, we can use the formula:
Amount left = Initial amount x (1/2)^(number of half-lives)
Starting with 256 g of Zeldum, we can calculate the amount left after 5 years:
Amount left = 256 x (1/2)^(5/1) = 256 x 1/32 = 8 g
Therefore, 8 grams of Zeldum are left after 5 years.