What are the two levels organization just after atoms?

Molecule and organelles

Explanation:

An atom is the smallest and most fundamental unit of matter, it is the lowest level of organization.Atoms then form molecules. Molecules are structures that contain two or more atoms that are held together by chemical bonds.Molecules in turn form macromolecules such as DNA, by joining of smaller units called monomers. The aggregates of macromolecules then form organelles that are surrounded by membranes.