Radioactivity Crossword

This printable crossword puzzle on the topic of Physics has 13 clues. Answers range from 4 to 13 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

Radioactive emissions that are al around us (10)
Number of protons in an atom (6,6)
Number of proton and neutrons in an atom (7,6)
The unit of radioactivity
The amount of radioactivity received (4)
Particle with 2 protons and 2 neutrons (5)
A fast moving electron (4)
An electromagnetic wave given out by radioactive atoms (5)
Counter used to detect radioactive emissions (6,6)
Occurs when DNA of a cell is altered by radiation (9)
Time taken for activity to half (4,4)
When one radioactive material is mixed with another material (13)
The ability to knock an electron off an atom (8)