| Subject | Spanish | English |
| environ. | elemento del grupo I alcalinos | element of group alkaline |
| environ. | elemento del grupo I | element of group Any of the monovalent metals lithium, sodium, potassium, rubidium, caesium, and francium, belonging to group 1A of the periodic table. They are all very reactive and electropositive; alkaline (alcalinos) |
| auto.ctrl. | elemento I | I element |
| auto.ctrl. | elemento I | integral element |