Science Crossword Puzzles
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Atoms and Matter
Across
3.Negatively charged particles that circle the nucleus.
5.The name of one of the types of quarks found in protons and neutrons.
6.The name of one of the types of quarks found in protons and neutrons.
7.Protons and neutrons are made up of these particles.
Down
1.The central part of the atom.
2.Positively charged particles found in the nucleus of the atom.
4.Neutral particles found in the nucleus of the atom.
  
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