Y9 sci half life

Multiple Choice

Protactinium-233 undergoes beta decay into uranium-233.

 

Name the parent isotope.

• uranium-233

• Protactinium-233

• Beta particle

• Radiation

Multiple Choice

Protactinium-233 undergoes beta decay into uranium-233.

 

Name the daughter isotope.

• uranium-233

• Protactinium-233

• Beta particle

• Radiation

Multiple Choice

Recall if it is possible to predict exactly when a specific atom of a radioisotope will undergo decay.

• Yes

• No (it isn't PERFECTLY EXACT, just a prediction)

Multiple Choice

Identify the best definition of a half-life.

• Half-life is the time it takes for ALL the nuclei in a sample to undergo radioactive decay

• Half-life is the time it takes for HALF the nuclei in a sample to undergo radioactive decay

Multiple Choice

Recall whether all radioisotopes have the same half-life.

• Yes

• No (different isotopes will have different half lives!)

Multiple Choice

The half-life of uranium-238 is 4.47 billion years, and the half-life of uranium-235 is 0.704 billion years.

 

Determine which of these uranium isotopes is considered more radioactive (hint it will be the isotope that decays the fastest)

• Uranium-238

• Uranium-235

Multiple Choice

Name the instrument that is used to measure radioactive decay.

• Sonographer

• Thermometer

• Nuclear reactor

• Gieger counter

Multiple Choice

Determine the half-life of osmium-193

• 10 hours

• 50 hours

• 150 hours

• 30 hours

Multiple Choice

Determine the half-life of nobelium-259

• 60 mins

• 300 mins

• 40 mins

• 30 hour

Multiple Choice

What is the half-life of iodine-131?

• 32 days
• 8 days
• 16 days
• 24 days

Multiple Choice

The % of the parent isotope remaining after 1 Half Life.

• 50%

• 25%

• 12.5%

• 6.25%

Multiple Choice

The % of the parent isotope remaining after 2 Half Lives.

• 50%

• 25%

• 12.5%

• 6.25%

Multiple Choice

What is the Half life of this isotope?

• 5 seconds

• 10 seconds

• 15 seconds

• 20 seconds

Multiple Choice

If one-fourth of the carbon-14 is remaining then how many half-lives have passed?

• 1
• 2
• 3
• 4

Multiple Choice

The half-life of Element X is 2 years.

How long has passed if Element X has reduced by half 5 times?

• 2 years

• 4 years

• 6 years

• 8 years

• 10 years

Summary!