Atomic Structure

Edit Answers
1234567891011121314
Across
  1. 3. – The total number of protons and neutrons in an atom.
  2. 4. – A substance made of only one type of atom.
  3. 7. – The dense central core of an atom containing protons and neutrons.
  4. 10. – A negatively charged ion.
  5. 12. – The outermost electron shell of an atom.
  6. 13. – A neutral particle found in the nucleus.
  7. 14. – A positively charged particle found in the nucleus.
Down
  1. 1. – The electrical property of a particle (positive, negative or neutral).
  2. 2. – Atoms of the same element with different numbers of neutrons.
  3. 5. – A negatively charged particle that moves around the nucleus.
  4. 6. – A positively charged ion.
  5. 8. – An energy level where electrons are found.
  6. 9. – An atom that has gained or lost electrons and carries a charge.
  7. 10. – The smallest particle of an element that retains its chemical properties.
  8. 11. – The count of protons in an atom (atomic number).