Chemistry

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Across
  1. 1. A charged particle
  2. 3. Number of electrons in an s type subshell.
  3. 4. Versions of the same element with different number of neutrons
  4. 7. A negatively charged subatomic particle
  5. 8. chlorine is in this group of the periodic table
  6. 9. A positively charged ion
  7. 10. A theory of atomic structure where electrons orbit the nucleus in different energy levels
Down
  1. 2. This element has 7 protons
  2. 5. Sodium is in this group of the periodic table
  3. 6. A negatively charged ion
  4. 9. This element has 6 protons