Noble Gas Notation

A shorthand method of writing electron configuration

Noble Gases

group 18 elementsNoble gas configurationthe outer main

energy level is fully occupied by 8 electrons

Steps to Write a Noble Gas Notation

write down the symbol of the preceding noble gas (last column)

Draw brackets around the noble gas symbol like this [Ne]

write the electron configuration starting from there

Practice

Write the noble gas notation for CaThe preceding noble gas is ArUse the periodic table to find the next

principal quantum number[Ar] 4s2

Additional Practice

Write the noble gas notation for ZrThe preceding noble gas is Kr[Kr] 5s2 4d2

Write the noble gas notation for NiThe preceding noble gas is [Ar][Ar] 4s2 3d8