PERIODIC CLASSIFICATION OF ELEMENTS

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Across
  1. 2. I have 15 as my atomic number
  2. 4. I have mass no.as 1
  3. 5. I am a metal with symbol"K"
  4. 10. I am non-metal with valency 3
  5. 12. I am noble gas with 2 electrons
  6. 13. I am a noble gas with mass no.40
  7. 16. I am 4 away fromnoblegas,Argon with atomic no.14
  8. 18. I have the 6th letter of alphabet as my
  9. 19. I am metal with symbol "Mg"
Down
  1. 1. have 2 electrons in1stshell,8in 2nd
  2. 3. I am metal with atomic no.11
  3. 6. I am a gas with 8 protons and 8 neutrons
  4. 7. I am 3 away from noble gas Helium with mass no.11
  5. 8. My atomic no.is sum of 1 and 2
  6. 9. I am metal with atomic no.13
  7. 10. I am noble gas with valency 0 and mass no.20
  8. 11. I am a non-metal with 6 neutrons
  9. 14. I am element having valency 2
  10. 15. I am metal with valency 2
  11. 17. Iamnon-metalandpresentinliquidstateatroom