Answer
Ne- Electronic Configuration-$1s^{2}2s^{2}2p^{6}$
Valence Electrons- 8
Ar- Electronic Configuration-$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$
Valence Electrons- 8
Work Step by Step
Neon has an atomic number of 10.
Therefore electronic configuration of Ne is $1s^{2}2s^{2}2p^{6}$.
Valence Electrons are the number of electrons in the valence shell (outer most shell) of the atom. Since Ne is a noble gas, it has 8 electrons in its valence shell.
Argon has an atomic number of 18. Therefore electronic configuration of Ar is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$.
Ar too is a noble gas and has 8 electrons in its valence shell.
