Y10 Half-Life

Front

What is Half-life?

Back

The amount of time it takes for half the nuclei in a sample of the isotope to decay.

Front

What happens to the atomic number when a neutron turns into a proton?

Back

The atomic number increases by 1.

Front

What is the Half Life of iodine-131?

Back

3 days.

Front

Which type of nuclear radiation is emitted when an alpha particle is released?

Back

Alpha radiation.

Front

If 10 mg of iodine-131 is given to a patient, how much is left after 24 days if its half-life is 8 days?

Back

1.25 mg.

Front

Define nuclear decay.

Back

The process by which an unstable atomic nucleus loses energy by radiation.

Front

What is the difference between alpha, beta, and gamma radiation?

Back

Alpha radiation consists of helium nuclei, beta radiation consists of electrons or positrons, and gamma radiation consists of high-energy photons.

Front

What is a radioactive isotope?

Back

An isotope that is unstable and decays over time, emitting radiation.

Front

How does half-life relate to the stability of an isotope?

Back

A shorter half-life indicates a less stable isotope, while a longer half-life indicates greater stability.

Front

What is the formula to calculate the remaining quantity of a substance after a certain number of half-lives?

Back

Remaining quantity = Initial quantity × (1/2)^(number of half-lives).