Crossword Puzzle Science

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Across
  1. 3. An Ion with a positive charge.
  2. 8. Neutrons have this charge.
  3. 11. A Subatomic particle with a negative charge
  4. 12. A Subatomic particle with a positive electric charge
  5. 14. Electrons have this charge.
Down
  1. 1. The number of a chemical element in the periodic system.
  2. 2. An Ion with a negative charge.
  3. 4. Each of two or more forms of the same element that contain equal numbers of protons,but a different number of neutrons in their nuclei.
  4. 5. A substance on the periodic table.
  5. 6. The positively charged center of the atom consisting of protons and neutrons
  6. 7. Protons have this charge.
  7. 8. A Subatomic particle with a neutral charge
  8. 9. Basic particle of chemical elements.It consists of a nucleus of protons and neutrons,surrounded by electrons
  9. 10. Any atom or group of atoms that bears one or more positive or negative electrical charges.
  10. 13. The total number of nucleons in the atom.