This coefficient (3s) refers to the thirds-orbital in the electron cloud around the positive core. And if you're wondering what an s-orbital is: that is a "shell" or "peel" in which the max 2 electrons are most likely to be, according to some heavy calculations
1s2, 2s2 2p6, 3s2 3p1or[Ne], 3s2 3p1
Beryllium- 1s2, 2s2 or [He] 2s2 Magnesium- 1s2, 2s2, 2p6, 3s2 or [Ne] 3s2 Calcium- 1s2, 2s2, 2p6, 3s2, 3p6,4s2 or [Ar] 4s2 Strontium- 1s2, 2s2, 2p6,3s2,3p6, 4s2, 3d10, 4p6,5s2 or [Kr] 5s2
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p6 3s2 3p1
Silicon.
cs2Electronic Configurationc6=1s2, 2s2, 2p6 s16=1s2, 2s2, 2p6, 3s2, 3p6s16=1s2, 2s2, 2p6, 3s2, 3p6
1s2 2s2 2p6 and is N3- nitrate
The investigator will find that 1s2 2s2 2p6 is the electron configuration for neon.
1s2, 2s2 2p6, 3s2 3p1or[Ne], 3s2 3p1
The element with the electron configuration 1s2 2s2 2p6 is neon.
1s2 + 2s2 + 2p6 + 3s2 + 3p4 = sulfur's orbital notation
Beryllium- 1s2, 2s2 or [He] 2s2 Magnesium- 1s2, 2s2, 2p6, 3s2 or [Ne] 3s2 Calcium- 1s2, 2s2, 2p6, 3s2, 3p6,4s2 or [Ar] 4s2 Strontium- 1s2, 2s2, 2p6,3s2,3p6, 4s2, 3d10, 4p6,5s2 or [Kr] 5s2
1s2 2s2 2p6 3s2 3p6
Group 2 (Alkaline Earth Metals) Beryllium: 1s2 2s2 Magnesium: 1s2 2s2 2p6 3s2 Calcium: 1s2 2s2 2p6 3s2 3p6 4s2 Strontium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 Barium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 4d10 5p6 6s2 Radium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4f14 4d10 4p6 5s2 5d10 5p6 6s2 6s2 6p6 7s2
1s2 2s2 2p6
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s1