This is the time required for one half of a sample of a radioisotope to decay.
What is a half-life?
100
This is the element resulting from the beta decay of sodium- 24.
What is Magnesium-24
100
These subatomic particles are theorized to be the basic units of matter.
What are quarks
100
This is the attractive force that binds protons and neutrons together in the nucleus.
What is a strong nuclear force?
200
A mass number of a nucleus remains the same when this happens.
What is "a beta particle is emitted"?
200
Using this process the age of an object is determined by comparing the object's carbon-14 levels with carbon-14 levels in the atmosphere.
What is radiocarbon dating?
200
When this radioisotope undergoes alpha decay it produces radium-226.
What is Thorium-230?
200
These are elements with atomic numbers greater than 92.
What are transuranium elements?
200
When neutrons are released during the splitting of an initial nucleus triggering a series of nuclear fissions this is the result
What is a chain reaction?
300
This penetrating ray is emitted by unstable nuclei, has no mass or charge and travels at the speed of light.
What is a gamma ray?
300
This element has a half life of 5370 years.
What is Carbon-14?
300
When lead-210 becomes bismuth-210, this type of radioactive decay is occuring.
What is Beta decay?
300
Both protons and neutrons belong to a class of particles that are made up of this many quarks.
What is three?
300
This is the process where the nuclei of two atoms combine to form a larger nucleus
What is fusion?
400
This positively charged particle is made up of two protons and two neutrons.
What is an alpha particle?
400
Iridium-182 has a half life of 15 minutes. This much
iridium-182 remains of a 2 gram sample after 1 hour.
What is 1/8 g.?
400
This is the product of beta decay for strontium-90.
What is Yttrium-90? (Y)
400
During the middle ages, scientists, also known as alchemists tried to achieve artificial transmutation by turning lead into gold. They were unsuccessful because doing so would create a chemical change and artificial transmutation is this type of change.
What is a nuclear change?
400
Scientists envision fusion reactors as clean source of electricity. The main problems they are facing in making this a reality are these two things.
What are the high temperatures required and the ability to contain the plasma?
500
This is the process in which an unstable atomic nucleus emits charged particles and energy.
What is radioactivity?
500
Radio carbon dating can be used to estimate the age of objects containing carbon that are less than this age.
What is 50,000 years
500
Neptunium-237 is the product of alpha decay of this element.
What is Americium-241?
500
Scientists perform artificial transmutation by bombarding atomic nuclei with high-energy particles such as these.
What are protons, neutrons, or alpha particles?
500
In the famous equation E=mc^2 introduced by Albert Einstein in 1905, the variables E, m, and c represent these three things.