How are elements, atoms, and molecules connected with one another

Lets start with what atoms are. Atoms are (besides quarks) the tiniest things that make up every supstance in the universe, including molecules.
On the other hand, elements are supstances that cannot be broken down into other supstances. Some elements are Hydrogen, Oxygen, Lithium...
Molecules are made up out of different elements. For example, H2O (water) is made out of Hydrogen and Oxygen. All of these things are made up of atoms.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later