19 questions
Nuclear reactions involve the ______________ of an atom
nucleus
electrons
Which is not a part of an atom's nucleus?
Neutron
Proton
Electron
All are part of the nucleus
Nuclear reactions occur because ______________ nuclei change their number of protons and neutrons to become ________________ and give off a large amount of energy.
STABLE ; STABLE
STABLE ; UNSTABLE
UNSTABLE ; STABLE
UNSTABLE ; UNSTABLE
Which of the following is the term for the spontaneous emission of rays or particles from certain elements, such as uranium?
nuclear bomb
radioactivity
chemical reaction
absorption
Which of the following types of radiation is relatively the most dangerous?
alpha particles
beta particles
gamma rays
What does the 232 in the symbol for uranium-232 represent?
The atomic number
The mass number
The number of electrons and protons combined
The number of neutrons
Which type of nuclear radiation is this symbol for?
Alpha
Beta
Gamma
Positron
______
Fill in the blank to correctly balance the nuclear equation
Balance the following equation:
146C --> 0-1e + ________
145B
146C
147N
42He
What type of nuclear reaction is shown here:
Alpha decay
Beta decay
Electron capture
Positron emission
What is the definition for the half-life of a sample of a specific isotope?
half of the lifespan of an isotope
50 years
the time it takes for a sample of atoms to decay and have half of their original amount/mass remaining.
half the life expectancy of a group of animals
How many half-lives pass by if we start with 1000 atoms of uranium-234 and end up with 250 atoms?
1 half-life
2 half-lives
3 half-lives
4 half-lives
If we start with 600 grams of a radioactive isotope and 3 half-lives go by, how many grams of that same isotope will remain?
0 grams
150 grams
300 grams
75.0 grams
Which process is being shown in the image?
Nuclear Fission
Nuclear Fusion
A normal chemical reaction
When two or more nuclei combine to make a larger nucleus and release a lot of energy, this is known as _________________
nuclear fusion
nuclear fission
a regular chemical reaction
Where does nuclear fusion take place?
In nuclear power plants on earth
In stars (like our sun)
around the corner from our school
Nuclear fusion does not happen at all. It is impossible.
Use the graph to determine the half-life of iodine-131