Group 0 elements

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Across
  1. 4. A Group 0 element used in fluorescent lighting and signs.
  2. 6. On the right-hand side of the periodic table.
  3. 8. The state of matter of Group 0 elements at room temperature.
Down
  1. 1. A Group 0 element in Period 4.
  2. 2. A Group 0 element with the chemical symbol 'Xe'.
  3. 3. On the left-hand side and centre of the periodic table.
  4. 5. The element at the top of Group 0.
  5. 7. The element below neon in Group 0.