Elements

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Across
  1. 2. Having atomic number equal to days in a week
  2. 5. Name of positively charged ions
  3. 6. Subatomic particle with a positive charge
  4. 7. Name of negatively charged ions
  5. 9. Charged species are known as
Down
  1. 1. Combining capacity of an atom
  2. 3. Subatomic particle with a negative charge
  3. 4. Shells of an atom are designated as
  4. 7. Building blocks of all matters
  5. 8. Had no charge and mass almost equal to proton