Electron Configuration with Noble Gas Shorthand

Give the electron configuration of the following noble gases

He (2e-) = 1s²

Ne (10e-) = 1s² 2s² 2p^6

Ar (18e) = 1s² 2s² 2p^6 3s² 3p^6

Electrons are lost from the 4s sublevel first

1. Negative Ions

2. Positive Ions

3. Transition Metals

Transition metal ions don’t always follow the pattern of taking on the electron configuration of the closest noble gas

• Transition metal electron configurations must be determined from the charge on the ion