Radioactivity Vocabulary
General composition of atoms (3 parts)
What are protons, neutrons, & electrons?
3 types of Radioactive Particles involved in nuclear decay
What are alpha, beta, and gamma?
Time it takes for 1/2 of a radioactive element to decay
What is half-life?
Primary source of the Sun's energy
What is Nuclear Fusion?
Alpha particles cannot even pass through a sheet of paper T/F
What is True?
Spontaneous emission of energy from unstable atoms
What is radioactivity?
Particles emitted by unstable atoms during alpha decay
What are 2 protons and 2 neutrons?
The half-life of an isotope is 4days. At the start there are 1024 atoms of this isotope. The # of atoms there will be after 4 days.
What is 512?
2 benefits of Nuclear Energy
What is:?
1. creates jobs 2. clean energy source 3. low-cost of operation 4. reliable
Atomic particle that determines the total amount of charge in an atom's NUCLEUS
What is the # of protons?
Process of nuclear decay is also known as
What is radioactivity?
Electric charge of an alpha particle
What is +2?
You have an isotope that has a half-life of one hour. The number of half-lives that have elapsed after 2 hours.
What is 2 half-lives?
3 Problems with Nuclear Energy
What is:?
1. radioactive waste 2. expensive to build 3. risks of nuclear accidents 4. non-renewable
Material able to stop gamma rays
concrete and lead
Force that causes protons & neutrons to be attracted to each other
What is the strong force?
Emitted from the nucleus during Beta decay
What is an electron?
Selenium-83 has a half-life of 25.0 minutes. How many minutes would it take for a 10.0 mg sample to decay and only have 1.25 mg of it remain?
What is 75 minutes?
Nuclear reaction that powers nuclear reactors in nuclear power plants
What is nuclear fission?
number of neutrons in a carbon-14 atom
What is 8?
The effect on the atomic # and the mass # to a nucleus during gamma decay
What is nothing? There is no change to the atomic # or mass # during gamma decay.
This happens to the atomic # of an element during beta decay when a neutron turns into a proton
What is it increases by 1?
Time it takes a 100.00g sample of As-81, with a half-life of 33 seconds, to decay to 6.25g?
What is 132 sec?
This occurs to the nucleus during fission.
This occurs to the nuclei during fusion.
Nucleus splits
Nuclei combine
Happens to the total repulsive force between protons as the size of the nucleus increases
What is it increases?