Question

You have 2,112 grams of a radioactive kind of mercury. How much will be left after 188 days if it's half-life is 47 days?

Answer 1

• 132 g

Explanation:

• Initial amount = 2112 g
• Time = 188 days
• Half-life = 47 days

188 days / 47 days = 4 periods

Mercury left after 188 days:

• 2112 * (1/2)^4 =
• 2112* 1/16 =
• 2112/16 =
• 132 g