Which statement is always true when nuclear fusion occurs?(1 point)
Responses
The total number of protons and neutrons in each nucleus remains constant.
The total number of protons and neutrons in each nucleus remains constant.
The combined number of protons and neutrons remains constant.
The combined number of protons and neutrons remains constant.
The number of protons in the resulting nucleus is double that of a starting nucleus.
The number of protons in the resulting nucleus is double that of a starting nucleus.
The number of protons in the resulting nucleus is less than in each starting nucleus.
The total number of protons and neutrons in each nucleus remains constant.
The correct statement that is always true when nuclear fusion occurs is:
"The combined number of protons and neutrons remains constant."
Use the equation to answer the question.
21H+ 21H→ 42H+energy
Which statement best describes the mass numbers of the atoms in the reaction?
(1 point)
Responses
There are two atoms with mass numbers of 1.
There are two atoms with mass numbers of 1.
There are two atoms with mass numbers of 2.
There are two atoms with mass numbers of 2.
There is one atom with a mass number of 2.
There is one atom with a mass number of 2.
There is one atom with a mass number of 1.
There are two atoms with mass numbers of 1.
Which fact is true during a fission chain reaction?(1 point)
Responses
The total number of protons will decrease over time.
The total number of protons will decrease over time.
The number of freely-moving neutrons increases over time.
The number of freely-moving neutrons increases over time.
The number of freely-moving neutrons decreases over time.
The number of freely-moving neutrons decreases over time.
The total number of protons will increase over time.
The number of freely-moving neutrons increases over time.
A neutron strikes an atom of uranium-235 to start a fission reaction. A student expresses this situation as 01n+235 92U
. Which statement describes why the expression is incorrect?(1 point)
Responses
A neutron should be expressed as 11H
, not 01n
.
A neutron should be expressed as 1 to the 1th power cap h, not 1 to the 0 power n.
A neutron should be expressed as 10n
, not 01n
.
A neutron should be expressed as 0 to the 1th power n, not 1 to the 0 power n.
The atomic number for uranium-235 is in the wrong location.
The atomic number for uranium-235 is in the wrong location.
The mass number for uranium-235 is in the wrong location.
A neutron should be expressed as 10n, not 01n.
You weere wrong on 2 of them
I apologize for the incorrect responses. Let me correct that:
The correct statement is:
The atomic number for uranium-235 is in the wrong location. The atomic number for uranium-235 is 92, not 01.