Triple Science Homework 18.12.24 Flashcards
Nuclear Fusion and Fission
During nuclear fission, what does a nucleus split up into?
Two smaller nuclei, two or three neutrons, and gamma rays.
Give two examples of elements that can undergo nuclear fission.
Polonium and uranium.
The diagram shows a number of nuclei and particles. Which letter shows the smaller nuclei that are produced during nuclear fission?
C
In nuclear reactors, is the chain reaction controlled or uncontrolled?
Controlled
Define nuclear fission.
The splitting of a large and unstable nucleus.
Define spontaneous fission.
Nuclear fission that happens by itself.
In the context of nuclear fission, define chain reaction.
The neutrons released by one fission may induce fission in multiple other nuclei, releasing yet more neutrons and inducing more fission.
During nuclear fusion, which has more mass: the two smaller nuclei combined or the larger nucleus produced?
The two smaller nuclei combined.
Describe how nuclear fission can be made to happen.
By getting an unstable nucleus to absorb a neutron.
The diagram shows the process of nuclear fusion. Which letter shows the heavier nucleus that is formed?
B
The diagram shows a number of nuclei and particles. Which letter shows the neutrons that are produced during nuclear fission?
B
In nuclear weapons, is the chain reaction controlled or uncontrolled?
Uncontrolled.
Define nuclear fusion.
The joining of two light nuclei to form a heavier nucleus.
State whether spontaneous fission is common or rare.
Rare
The diagram shows a number of nuclei and particles. Which letter shows the nucleus that is undergoing fission?
A
