Question
Question 1
Question 2
Question 3
A) Which fact is true during a fission chain reaction? (1 point)
The total number of protons will increase over time.
The number of freely-moving neutrons increases over time.
The number of freely-moving neutrons decreases over time.
The total number of protons will decrease over time.
A) A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as 0
1n +
235
92U
. Which statement describes why the expression is incorrect? (1 point)
A neutron should be expressed as 1
1H, not 0
1
n.
A neutron should be expressed as 1
0
n, not 0
1
n.
The atomic number for uranium-235 is in the wrong location.
The mass number for uranium-235 is in the wrong location.
A) It is possible to make a model of a fission chain reaction with mousetraps and table tennis balls, with the balls
placed on an armed trap. Which statement best explains why this is a good model? (1 point)
The table tennis balls represent protons that are released when the nucleus splits and cause other nuclei to split.
The table tennis balls represent neutrons that are released when the nucleus splits and cause other nuclei to split.
The table tennis balls represent nuclei that are split by protons and release energy.
The table tennis balls represent nuclei that are split by neutrons and release energy.
Question 4
Question 5
A) A student writes out an equation to represent a fission reaction. How can the student check that the equation is
correctly written? (1 point)
The mass number of the products should be equal to the atomic number of the products.
The total mass number of the reactants should equal the total mass number of the products.
The number of atoms of each element should be the same in the products and reactants.
The total number of atoms in the products should be equal to the number of atoms in the reactants.
A) Which change will always take place during nuclear fission? (1 point)
The nucleus with the largest mass will split into two or more relatively large pieces.
A nucleus will take in energy in large amounts, increasing its mass.
Several nuclei will combine into one nuclei.
Nuclei will be produced with much larger mass numbers
Question 2
Question 3
A) Which fact is true during a fission chain reaction? (1 point)
The total number of protons will increase over time.
The number of freely-moving neutrons increases over time.
The number of freely-moving neutrons decreases over time.
The total number of protons will decrease over time.
A) A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as 0
1n +
235
92U
. Which statement describes why the expression is incorrect? (1 point)
A neutron should be expressed as 1
1H, not 0
1
n.
A neutron should be expressed as 1
0
n, not 0
1
n.
The atomic number for uranium-235 is in the wrong location.
The mass number for uranium-235 is in the wrong location.
A) It is possible to make a model of a fission chain reaction with mousetraps and table tennis balls, with the balls
placed on an armed trap. Which statement best explains why this is a good model? (1 point)
The table tennis balls represent protons that are released when the nucleus splits and cause other nuclei to split.
The table tennis balls represent neutrons that are released when the nucleus splits and cause other nuclei to split.
The table tennis balls represent nuclei that are split by protons and release energy.
The table tennis balls represent nuclei that are split by neutrons and release energy.
Question 4
Question 5
A) A student writes out an equation to represent a fission reaction. How can the student check that the equation is
correctly written? (1 point)
The mass number of the products should be equal to the atomic number of the products.
The total mass number of the reactants should equal the total mass number of the products.
The number of atoms of each element should be the same in the products and reactants.
The total number of atoms in the products should be equal to the number of atoms in the reactants.
A) Which change will always take place during nuclear fission? (1 point)
The nucleus with the largest mass will split into two or more relatively large pieces.
A nucleus will take in energy in large amounts, increasing its mass.
Several nuclei will combine into one nuclei.
Nuclei will be produced with much larger mass numbers
Answers
GPT-4o mini
**Question 1:**
Which fact is true during a fission chain reaction?
- **The number of freely-moving neutrons increases over time.**
---
**Question 2:**
A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as \( 0^1n + 235^{92}U \). Which statement describes why the expression is incorrect?
- **A neutron should be expressed as \( 1^0n \), not \( 0^1n \).**
---
**Question 3:**
It is possible to make a model of a fission chain reaction with mousetraps and table tennis balls, with the balls placed on an armed trap. Which statement best explains why this is a good model?
- **The table tennis balls represent neutrons that are released when the nucleus splits and cause other nuclei to split.**
---
**Question 4:**
A student writes out an equation to represent a fission reaction. How can the student check that the equation is correctly written?
- **The total mass number of the reactants should equal the total mass number of the products.**
---
**Question 5:**
Which change will always take place during nuclear fission?
- **The nucleus with the largest mass will split into two or more relatively large pieces.**
Which fact is true during a fission chain reaction?
- **The number of freely-moving neutrons increases over time.**
---
**Question 2:**
A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as \( 0^1n + 235^{92}U \). Which statement describes why the expression is incorrect?
- **A neutron should be expressed as \( 1^0n \), not \( 0^1n \).**
---
**Question 3:**
It is possible to make a model of a fission chain reaction with mousetraps and table tennis balls, with the balls placed on an armed trap. Which statement best explains why this is a good model?
- **The table tennis balls represent neutrons that are released when the nucleus splits and cause other nuclei to split.**
---
**Question 4:**
A student writes out an equation to represent a fission reaction. How can the student check that the equation is correctly written?
- **The total mass number of the reactants should equal the total mass number of the products.**
---
**Question 5:**
Which change will always take place during nuclear fission?
- **The nucleus with the largest mass will split into two or more relatively large pieces.**