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Author: piqué sira
Description:
Keywords: , , , , , , online teaching

Content:
Definitions:
0. oxigen
1. Seleni
2. Ferro
3. hidrogen
4. sodi
5. bor
6. liti
7. Bari
8. alumini
9. cesi
10. potassi
11. xenó
12. nitrogen
13. sofre
14. plom
15. clor

Answers:
0. fe
1. N
2. H
3. cs
4. Li
5. xe
6. B
7. O
8. K
9. Al
10. Cl
11. Se
12. Pb
13. S
14. Ba
15. na
.