In database normalization which normal form says each element must be broken down into its smalled componant?

Question

In database normalization which normal form says each element must be broken down into its smalled componant i.e. address can't be used it must be house number, street name e.t.c.

Answer 1

First Normal Form (1NF) stupulates one value per field

1NF also stipulates no duplication of fields and existence of a primary key field