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 helium atom has 2 electrons, both in the s subshell of the first energy level. Its sub-shell electron configuration is 1s 2. The neon atom has 10 electrons. 2 electrons in the s subshell of the first energy level: 1s 2.8 electrons in second energy level, made up of 2 electrons in an s subshell and 6 electrons in a p subshell: 2s 2 2p 6. Its subshell electron configuration is 1s 2 2s 2 2p 6. The argon atom has 18 electrons.he helium atom has 2 electrons, both in the s subshell of the first energy level. Its sub-shell electron configuration is 1s 2. The neon atom has 10 electrons. 2 electrons in the s subshell of the first energy level: 1s 2.