Sure, here are the items organized according to their appearance in the periodic table:

1. Hydrogen
2. Helium
3. Lithium
4. Beryllium
5. Boron
6. Carbon
7. Nitrogen
8. Oxygen
9. Fluorine
10. Neon
Dusík, Sodík, Kyslík
Prvek | Pozice v periodické tabulce
------- | ------------------------
Dusík | 7
Sodík | 11
Kyslík | 8