Periodic Table

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Across
  1. 7. I am the only element in group 17 that is a liquid
  2. 8. I am a halogen with a mass of 129.934
  3. 9. I am part of the Nitrogen family and I have 16 neutrons
  4. 10. I have 2 electrons in my first shell, 8 electrons in my second shell and 6 electrons in my third shell
  5. 11. This element is necessary for our survival
  6. 13. I have 26 protons
  7. 14. I am a transition metal with 25 electrons
  8. 16. I am in the Carbon family and in period 5
  9. 17. I am a transition metal with 30 electrons
  10. 19. I am a noble gas with 2 electrons
  11. 21. My atomic number is 47 and I am used in making film
  12. 22. I am a silvery white metal used in making salt
  13. 23. I am in the Carbon family and mistaken for a pencil
Down
  1. 1. I am a gas with mass number 19
  2. 2. I am the head of the Carbon family and the basis of life
  3. 3. I am a metal with 28 electrons
  4. 4. I am in group 15 and make up 78% of the air
  5. 5. I am the first element in the 4th period and used to make fertilizer
  6. 6. My atomic mass is 35.453
  7. 12. I am a noble gas with 10 protons and 10 neutrons
  8. 15. My atomic number is 79
  9. 18. I have 20 neutrons and am found in your teeth and bones
  10. 19. I am not really an alkali metal but I'm in the same group because I behave like them.
  11. 20. I am a metal that is liquid at room temperature