3
1
1
2
1s 2s 2p 3s 3p
Valence Electrons- the electrons in the outermost energy level
2p 3s 3p 1s 2s
1s 2s 2p 3s 1s 2s 2p 3s
3p 4s
3
1s 2s 2p 3s 3p
4s 3d 4p
1s 2s 2p 3s 3p
![Electron Configuration Na: 1s 2 2s 2 2p 6 3s 1 Na: [Ne] 3s 1.](https://static.documents.pub/doc/80x56/56649cdc5503460f949a747c/electron-configuration-na-1s-2-2s-2-2p-6-3s-1-na-ne-3s-1.jpg)
![ELECTRON CONFIGURATIONS Sulfur 1s 2 2s 2 sp 6 3s 2 3p 4 Chromium 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 4 Lead (give the noble gas configuration) [Xe]6s 2 4f.](https://static.documents.pub/doc/80x56/56649cd75503460f9499f2eb/electron-configurations-sulfur-1s-2-2s-2-sp-6-3s-2-3p-4-chromium-1s-2-2s-2.jpg)
![ELECTRON CONFIGURATIONS · Longhand is 1s 2 2s 2 2p 6 3s 2 3p 5 You can abbreviate the first 10 electrons with a noble gas, Neon. [Ne] replaces 1s 2 2s 2 2p 6 Then continue as you](https://static.documents.pub/doc/80x56/5e7709b442f452627a541b17/electron-configurations-longhand-is-1s-2-2s-2-2p-6-3s-2-3p-5-you-can-abbreviate.jpg)
