Across
- 2. I am a noble gas with mass no.40
- 6. I have 15 as my atomic number
- 8. I have mass no.1
- 11. My atomic no.is sum of 1 and 2
- 13. I am a noble gas with valency 0
- 15. I am element having valency 2
- 16. I am 4 away from the noble gas,Argon with atomic
- 18. I am metal with valency 2
- 19. I have the 6th letter of alphabet as my symbol
- 21. I am non-metal and present in liquid state at
Down
- 1. I am non-metal with valency 3
- 3. I am a gas with 8 protons and 8 neutrons
- 4. and 6 in third shell
- 5. I am noble gas with 2 electrons
- 7. I am metal with atomic no.11
- 9. I am a metal with symbol"K"
- 10. I am 3 away from noble gas Helium with mass no.11
- 12. I am metal with symbol "Mg"
- 14. I am metal with atomic no.13
- 17. I have 2 electrons in first shell,8 in second
- 18. I am a non-metal with 6 neutrons
- 20. temperature with symbol"Cl"