Nuclear Physics
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
1.
The minimum mass of a fissile material necessary to sustain the chain reaction
3.
There are some radioactive elements, which can be converted into fissionable material
4.
In this process the atomic number and mass number of the radioactive nucleus remain the same
Down:
2.
A self-propagating process in which the number of neutrons goes on multiplying rapidly almost in a geometrical progression
5.
Low penetrating power
OK