Answer:
Before the noun.
Step-by-step explanation:
Articles are "the, a, an, or some" in English. In Spanish, these are:
The: "el/la" or "los/las"
A/an: "Un/una"
Some: "Unos/unas"
In English one would say "the book." In Spanish, one would say "el libro"
Other examples:
el artista
las flores
la mujer
un año