The half-life of carbon-14 is 5730 years.

Rex the dog died in 1750. What percentage of his original carbon-14 remained in 1975 when he was found by scientists?

The half-life of carbon-14 is 5730 years.

Rex the dog died in 1750. What percentage of his original carbon-14 remained in 1975 when he was found by scientists?

Suppose that the half-life of substance A is known to be . When substance A decays, it becomes substance B. If this is the only way that substance B can be produced, and a sample is found that contains of substance A and of substance B, what is the age of this sample?

Suppose that the half-life of substance A is known to be . When substance A decays, it becomes substance B. If this is the only way that substance B can be produced, and a sample is found that contains of substance A and of substance B, what is the age of this sample?

A scientist discovers a new radioactive nuclei. She runs a test on a sample and finds it has an activity of . later, it has an activity of .

Determine the activity after the original reading.

A scientist discovers a new radioactive nuclei. She runs a test on a sample and finds it has an activity of . later, it has an activity of .

Determine the activity after the original reading.

Suppose that an atom undergoes a series of decays. First, it undergoes two alpha decays, followed by two positron decays, and then finally by two gamma decays. How has the atomic number of this atom changed?

Suppose that an atom undergoes a series of decays. First, it undergoes two alpha decays, followed by two positron decays, and then finally by two gamma decays. How has the atomic number of this atom changed?

A test is done on a sample of a newly discovered radioactive nuclei, which has an activity of . later, it has an activity of .

Determine the half life of this nuclei.

Which of the fundamental forces is responsible for holding neutrons and protons together in the nucleus of an atom?