Half Life
Iodine-131 has a half life of 8 days. How much of 8 grams will be left after 32 days?
0.5 grams
The most and least dangerous nuclear particle.
Most: gamma
Least: Alpha
What is this process called:
Uranium-235 is split by a neutron, which in turn splits more uranium by the release of neutrons.
A chain reaction
What is the missing particle?
C146⟶N147+?
e 0-1
The radioactive element that the glow in the dark watch painters died of.
Radium
The half life of Iodine-131 is 8 days. How many days must go by for 25% of it to remain?
16 days
The particles that radon emits.
Alpha.
Fusion or fission?
Occurs in the center of stars.
Fusion
What is the missing isotope?
21284Po -> ____ + 42He
20882Pb
Atomic weaponry is made using these 2 types of technology.
Fission and fusion.
The half life of Sodium-24 is 15 hours. What fraction would be left after 60 hours?
1/16?
The type of material that gamma radiation cannot penetrate.
Lead or thick concrete.
Harnessed by nuclear reactors.
Fission.
This type of decay releases a particle made of two protons and two neutrons.
Alpha decay
What do many of us eat that is radioactive?
Bananas.
The half life of Sodium-24 is 15 hours. If it takes 60 hours to ship it from the lab to reach its destination, how much should be sent if 12 grams are required?
192 grams.
How can alpha radiation harm you?
If you inhale it or ingest it.
The splitting of the nuclei of atoms in both nuclear reactors or naturally in heavy isotopes
Fission.
With _____________ decay, a proton changes into a neutron or a neutron to a proton. The identity of the element changes, but the mass does not.
Beta
What does Elon Musk want to use thermonuclear devices for?
Melting the ice caps on Mars.
The half-life of uranium-238 is 4.5 billion years and the age of the earth is 4.5 x 109 years. What fraction of the uranium-238 that was present when the earth formed is still present?
1/2
Emits a positron
Beta positive decay.
The emission of particles or energy to become more stable.
Nuclear radiation.
Release of __________ radiation does not change the identity of the element as the radiation is energy, not a particle.
Gamma.
Used in smoke detectors.
Alpha radiation
or, Americium