A Timeline of Atomic Models

Electrons in this model are NOT found in set paths or orbits but are found in electron clouds.

This model of the atom shows the electrons in fixed energy levels and looks like planets orbiting the sun.

In this model of the atom, the atom is described as mostly empty space with a + center called the nucleus. With this model, the nucleus is a tiny, dense, + charged core.

This model of the atom is sphere of positive charge with negatively charged electrons embedded in it.

In this model, atoms are described as indivisible (cannot be divided).