Periodic Table Puzzle 1. 1. I have 26 protons.: Iron, Fe 2. 2. My atomic mass is 35.453: Chlorine, Cl 3. 3. I am not really an alkali metal, but since I have 1 electron I behave like them.: Hydrogen, H 4. 4. I am a metal with 28 electrons: Nickel, Ni 5. 5. I have 2 electron in the first shell, 8 in the second shell, and 6 in the third shell.: Sulfur, S 6. 6. I am the head of the carbon family know as the basis of life.: Carbon, C 7. 7. I am a member of the Boron family and am the most abundant metal in Earth's crust.: Aluminum, Al 8. 8. I am a gas with 8 neutrons and 8 protons.: Oxygen, O 9. 9. my atomic number is 79.: Gold, Au 10. 10. I am a member of the Carbon family and am often mistaken for the end of your pencil.: Lead, Pb 11. 11. I am a transition metal with 25 electrons.: Manganese, Mn 12. 12. I am a metal that is liquid at room temp.: Mercury, Hg 13. 13. I make up 78% of the air and am found in the 15th group.: Nitrogen, N 14. 14. My atomic number is 47 and I am used to make photographic film.: Down is Silver, Ag. Across is Sodium, Na. 15. 15. I have 20 neutrons and am found in your teeth and bones.: Calcium, Ca 16. 16. I am a member of the Nitrogen family with 16 neutrons.: Phosphorus, P 17. 17. I am a member of the alkaline earth metals used to make fireworks and medicines.: Magnesium, Mg 18. 18. I am a gas with the mass number 19: Flourine, F 19. 19. I am the element in the fourth period used in making fertilizer.: Potassium, K 20. 20. I am a noble gas with 2 electrons.: Helium, He 21. 21. I am the second most abundant element in earth crust and have 14 electrons.: Silicon, Si 22. 22. You can find me in the carbon family in the fifth period.: Tin, Sn 23. 23. I am a member of the halide family with a mass number of 53: Iodine, I 24. 24. I am a transition metal with 30 electrons useful in making paint.: Zinc, Zn 25. 25. I am the only element in the halide family that is a liquid.: Bromine, Br 1/1