The Allegory of the Cave. The dialogue between Socrates and Glaucon is probably fictitious and composed by Plato; whether or not the allegory originated with Socrates, or if Plato is using his mentor as a stand-in for his own idea, is unclear. In the dialogue, Socrates asks Glaucon to imagine a cave, in which prisoners are kept.
The d sublevel consists of five orbitals that can hold a maximum of  two electrons each. The total maximum number of electrons that the  d sublevel can hold is 10 electrons.
The electrons go around the nucleus like planets orbit around the sun. All electrons have their energy levels â a certain distance from the nucleus.Each energy level can hold a certain number of electrons. Level 1 can hold 2 electrons, Level 2- 8 electrons, Level 3- 18 electrons, and level 4 â 32 electrons.