Question

a half - life graph is shown below. based on the graph, what is the half life for the element? disintegration rate (decays per minute) 16,000 14,000 12,000 10,000 8,000 6,000 4,000 2,000 0 0 4 8 12 16 20 24 time (days) 4 days 8 days 24 days 28 days

Explanation:

Step1: Identify initial value

The initial disintegration rate is 16000 decays per minute at time = 0 days.

Step2: Find half - value

Half of 16000 is 8000 decays per minute.

Step3: Locate on graph

Find the time when the disintegration rate is 8000 decays per minute on the graph. It is at 8 days.

Answer:

8 days