Periodic Table Puzzle

2. I am the first element in the fourth period used in making fertilizer.
5. I am a metal with 28 electrons.
6. I am a gas with 8 protons and 8 neutrons.
9. I have 2 electrons in the first shell, 8 in the second shell, and 6 in the third shell.
10. my atomic mass is 35.453
12. I have 20 neutrons and am found in your teeth and bones.
14. I am a gas with a mass number of 19.
15. I am a member of the nitrogen family with 16 neutrons.
17. my atomic number is 47 and I am used to make photographic film.
20. I am a member of the alkaline earth metals used to make fireworks and medicines.

1. I am the only element in the halide family that is a liquid.
3. I have 26 protons.
4. I am a transition metal with 25 electrons.
7. I am a member of the boron family and am the most abundant metal in the Earth's crust.
8. I am a transition metal with 30 electrons useful in making paint.
11. I am a member of the halide family with an atomic number of 53.
13. I am a metal that is a liquid at room temperature.
16. I am not really an alkali metal, but since I have only 1 electron I behave like them.
17. I am a silvery white metal used to make salt.
18. I am a member of the carbon family often mistaken for the end of your pencil.
19. you can find me in the carbon family in the fifth period.