Question

20 element periodic table​

Answer 1

Hydrogen (H)
Helium (He)
Lithium (Li)
Beryllium (Be)
Boron (B)
Carbon (C)
Nitrogen (N)
Oxygen (O)
Fluorine (F)
Neon (Ne)
Sodium (Na)
Magnesium (Mg)
Aluminum (Al)
Silicon (Si)
Phosphorus (P)
Sulfur (S)
Chlorine (Cl)
Argon (Ar)
Potassium (K)
Calcium (Ca)

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Answer 2

1. Hydrogen(H)
2. Helium(He)
3. Lithium(Li)
4. Beryllium(Be)
5. Boron(B)
6. Carbon(C)
7. Nitrogen(N)
8. Oxygen(O)
9. Fluorine(F)
10. Neon(Ne)
11. Sodium(Na)
12. Magnesium(Mg)
13. Aluminum(Am)
14. Silicon(Si)
15. Phosphorus(P)
16. Sulphur(S)
17. Chlorine(Cl)
18. Argon(Ar)
19. Potassium(K)
20. Calcium(Ca)