Random
Nuclear Reactions
Half-Life
100

subatomic particle(s) located in the nucleus

What are protons and neutrons

100
Balance the following reaction: Iron-55 + _____ --> Manganese-55
What is a beta particle
100
What is half-life
Time required for half the amount of a radioactive element to decay
200
What is fusion?
What is two smaller nuclei combining to form a larger nucleus
200
Balance the following reaction: _____ --> Sulfur-32 + beta particle
Phosphorus-32
200

Thorium-234 has a half-life of 24 days, started with 100 g how much is left after 48 days?

What is 25 grams

300
What is fission?
What is a nuclear reaction that involves the splitting of a heavy nucleus into a lighter nucleus.
300
Balance the following reaction: Plutonium-242 --> alpha particle + _____
Uranium-238
300

Plutonium-239 has a half-life of 24,110 years how long will it take for 6.25 g to remain of a 100 g sample?

What is 96,440 years

400
In the isotope Uranium-235, what does the number 235 represent?
What is the mass number
400
Balance the following reaction: Californium-252 + _____ --> 3 neutrons + Lawrencium-259
Boron-10
400

An isotope has a half-life of 6 hours. What percentage will be left after 24 hours?

6.25%

500
spontaneously emitted particles or energy
What is radiation
500
Explain why we have to balance nuclear reactions.
Law of Conservation of Mass
500

A sample of strontium-90 has an activity of 5000 Bg. After 120 years the activity has fallen to 625 Bg. What is the half-life of strontium-90?

3

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