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 neon atom has 10 electrons. 2 electrons in the s subshell of the first energy level: 1s2. 8 electrons in second energy level, made up of 2 electrons in an s subshell and 6 electrons in a p subshell: 2s2 2p6. Its subshell electron configuration is 1s2 2s2 2p6. The argon atom has 18 electrons. 2 electrons in the s sub-shell of the first energy level: 1s2. 8 electrons in the second energy level made up of 2 electrons in an s subshell and 6 electrons in a p subshell: 2s2 2p6.