Nuclear Fusion/Fission
Nuclear Chemistry
Nuclear Decay
Nuclear Chemistry Part 2
Solve the equations
100
The splitting apart of breaking up of U-235 is defined as...
Nuclear Fission
100
How old is Kaos, the great dane?
4 years
100
In alpha Decay a __________ particle is released.
What is Helium Particle
100
What is the last stable element on the periodic table of elements?
Lead (82 atomic number)
Any element above 82 tends to be unstable and thus radioactive.
100
222. Rn
86.
200
Two atoms that combine together and release a ton of energy in the process is defined as....
Nuclear Fusion
200
Radiation definition....
The penetrating rays and particles emitted by radioactive sources.
200
The alpha decay of Fr-211 results in:
He + At-207
200
Define Half-Life...
What is the time required for one-half of the nuclei of a radioisotope sample to decay into a new element.
200
0. B
-1
300
What subatomic particle is primarily responsible for causing chain reactions involved in fission?
Neutrons!
300
Radioisotopes definition...
When the nucleus of an atom is unstable due to an imbalance of neutrons and protons.
300
The beta decay of Carbon-14
e + N-14
300
The half life of Carbon-14 is...
5730 years
300
241. Am
95
400
Both Fission and Fusion reactions release massive amounts of energy in the form of heat and gamma radiation. However, one of these two is more energetic than the other. Which process, fission or fusion releases more energy?
Fusion! It's what powers the sun and why hydrogen bombs are MUCH more scary than uranium bombs.
400
Carbon-14 is a radioisotope. Why?
Because it has an imbalance of protons and neutrons.
400
Type of radiation that can penetrate through paper, wood and is stopped by concrete and lead.
Gamma radiation
400
Carbon-14 emits beta radiation and decays with a half life of 5,730 years. Assume you start with 100g of Carbon-14.
How much carbon is left after 1 half life?
What is 50g.
400
The half-life of Zn-71 is 2.4 minutes. If one had 100.0 g at the beginning, how many grams would be left after 7.2 minutes has elapsed?
7.2 / 2.4 = 3 half-lives
(1/2)3 = 0.125 (the amount remaining after 3 half-lives)
100.0 g x 0.125 = 12.5 g remaining
500
In the sun, ______________ atoms fuse together to create ______________ atoms, which produces a bunch of energy.
Hydrogen
Helium
500
The three most common types of Nuclear Decay are...
Alpha Decay
Beta Decay
Gamma Decay
500
Name the type of decay in the equation below
Beta + gamma
500
Carbon-14 emits beta radiation and decays with a half life of 5,730 years. Assume you start with 100g of Carbon-14.
How much carbon is left after 4 half lifes?
What is 6.25g
500
After 24.0 days, 2.00 milligrams of an original 128.0 milligram sample remain. What is the half-life of the sample?
The decimal fraction remaining:
2.00 mg / 128.0 mg = 0.015625
2) How many half-lives must have elaspsed to get to 0.015625 remaining?
(1/2)n = 0.015625
n log 0.5 = log 0.015625
n = log 0.5 / log 0.015625
n = 6
3) Determine the half-life:
24 days / 6 half-lives = 4.00 days