Atoms and Radioactivity Crossword

This printable crossword puzzle on the topic of Physics has 20 clues. Answers range from 3 to 10 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

the centre of an atom
positive particle found in the nucleus
uncharged particle found in the nucleus
negatively charged particle
electrons travel around the nucleus
charge of a nucleus
overall charge of an atom
a form of an element with different numbers of neutrons
charged atom
the charge of an ion with more electrons than protons
positively charged radioactive particle
negatively charged radioactive particle
part of the electromagnetic spectrum
named the nucleus
famous for his plum pudding model of the atom
material that stops virtually all radiation
stops alpha particles
stops beta particles
alpha particles knock electrons off atoms
radiation that is always there, mostly from the cosmos