Periodic Table Puzzle

4. I am a noble gas with 2 electrons.
6. I am a gas with an atomic mass of 18.998.
7. I am the only element in the halide family that is a liquid.
12. I am the head of the carbon family known as the "basis for life."
14. I am a transition metal with 25 electrons.
16. I am a transition metal with 30 electrons useful in making paint.
17. I am a member of the halide family with an atomic number of 53.
18. I am the first element in the fourth period used in making fertilizer.
20. I make up 78% of the air and I'm found in the 5th group.
21. I am a member of the alkaline earth metals used to make fireworks and medicines.
23. I am the 2nd most abundant element in the Earth's crust and have 14 neutrons.
25. My atomic mass is 35.453.

1. I am not really an alkali metal, but since I have only 1 electron I behave like them.
2. I am a metal that is liquid at room temperature.
3. You can find me in the carbon family in the fifth period.
5. My atomic number is 47 and I am used in the making of photographic film.
8. I am a gas with 8 protons and 8 neutrons.
9. I have 26 protons.
10. I am a member of the nitrogen family with 16 neutrons.
11. I have 20 neutrons and am found in your teeth and bones.
13. I am a member of the boron family and am the most abundant metal on Earth's crust.
15. I am a silvery-white metal used to make salt.
19. I have 2 electrons in the first shell, 8 in the second shell, and 6 in the third shell.
22. My atomic number is 79.
24. I am a metal with 28 electrons.
26. I am a member of the carbon family often mistaken for the end of your pencil.