Year 9 Science Atom Basics

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Across
  1. 2. The columns in the periodic table are called this.
  2. 4. Made up of only one type of atom.
  3. 7. A category on the periodic table that contains the most elements.
  4. 9. The rows in the periodic table are called this.
  5. 11. The building blocks of all matter.
  6. 12. 1800s chemist who suggested that atoms of an element are the same type.
  7. 14. In 1911 this person discovered protons.
  8. 16. In 1932 this person discovered the neutron.
  9. 17. A category on the periodic table where you would find hydrogen and helium.
Down
  1. 1. Has a positive charge and is found in the nucleus of an atom.
  2. 3. Has no charge and is found in the nucleus of an atom.
  3. 5. Atoms join together to make these things.
  4. 6. A category on the periodic table where you would find boron.
  5. 8. In 460BC this person came up with the idea of atoms.
  6. 10. In 1912 this person discovered that electrons orbit around the nucleus at different levels.
  7. 13. Has a negative charge and orbits around the nucleus of an atom.
  8. 15. In 1897 this person suggested the 'pudding' model of the atom.