A noble gas configuration of an atom consists of the elemental symbol of the last noble gas prior to that atom, followed by the configuration of the remaining electrons. So for sodium, we make the substitution of [Ne] for the 1s²2s²2p⁶ part of the configuration. Sodium's noble gas configuration becomes [Ne]3s¹.

How do you write noble gas notation?

Find the noble gas preceding the element on the periodic table. Write the noble gas configuration by writing the noble gas core, followed by the valence electrons. A noble gas core is the noble gas element symbol enclosed in brackets: [He], [Ne], [Ar], [Kr], [Xe], or [Rn].

What is the orbital notation for noble gas?

Noble Gas Abbreviation

For example, instead of Sc : 1s²2s²2p⁶3s²3p⁶4s²3d¹ it would be abbreviated as [Ar]4s²3d¹ or [Ar]3d¹4s². For Ag the abbreviation would be: [Kr]5s¹4d¹⁰ (see orbital diagram above), and for Os: [Xe]6s²4f¹⁴5d⁶ or [Xe]4f¹⁴5d⁶6s².