Across
- 4. 1ST ELEMENT OF PERIOD 1
- 6. 1ST HALOGEN ELEMENT
- 7. NOBLE GAS WITH Z = 10
- 9. 1ST ALKALINE EARTH METAL
- 10. ATOMIC NUMBER Z = 7
Down
- 1. 1ST ELEMENT IN GROUP 16
- 2. ATOMIC NUMBER Z = 5
- 3. 1ST ELEMENT IN NOBLE GASES GROUP
- 5. ATOMIC NUMBER Z = 3
- 8. 2ND ELEMENT IN PERIOD 2, GROUP 14