Who is the greek philosopher who made a model of the atom?

Answer 1

The earliest references to the concept of atoms date back to ancient India in the 6th century BCE,[8] appearing first in Jainism.[9] The Nyaya and Vaisheshika schools developed elaborate theories of how atoms combined into more complex objects.[10] In the West, the references to atoms emerged a century later from Leucippus, whose student, Democritus, systematized his views. In approximately 450 BCE, Democritus coined the term átomos(Greek: ἄτομος), which means "uncuttable" or "the smallest indivisible particle of matter". Although the Indian and Greek concepts of the atom were based purely on philosophy, modern science has retained the name coined by Democritus.

Democritus did not actually create a model per se, but he did along with his teacher Leucippus create the idea of the existence of an atom.

As far as the model of an atom...

Niels Bohr was a Danish scientist who introduced the model of an atom in 1913. Bohr's model consists of a central nucleus surrounded by tiny particles called electrons that are orbiting the nucleus in a cloud. These electrons are spinning so fast around the nucleus of the atom that they would be just a blur if we could see particles that small. In our pictures and exercises the electron appears to orbit in the same path around the nucleus much like the planets orbit the Sun. But, please be aware that electrons do not really orbit in the same path. The electrons actually change their orbit with each revolution.