Periodic table

2. atomic number 18 chemical symbol ar
6. atomic number 15 chemical symbol p
8. atomic number 12 chemical symbol mg
11. mass number 4.002602 atomic number 2
12. atomic number 3 mass number 6.941, Li
14. atomic number 13 chemical symbol ai
15. ability to combine itself atom to atom to form long chains atomic number 12.011
18. atomic number 14 chemical symbol si
19. chemical symbol H, atomic number 1
20. distinctive property colorless tastless gas atomic number 10

1. atomic number 20 chemical symbol ca
3. chemical symbol, O atomic number 8
4. atomic number 11 chemical symbol na
5. atomic number 5 Chemical symbol B
7. atomic number 19 chemical symbol k
9. atomic number 16 chemical symbol s
10. atomic number 17 chemical symbol cl
13. atomic number 9 mass number 18.998403
16. chemical symbol Be distinctive property,one of the highest melting points of the light metals
17. atomic number 14.0067 chemical symbol, N