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
The element with the electron configuration 1s2 2s2 2p6 3s2 3p6 is Argon, which has an atomic number of 18.
1s2 2s2 2p6 3s2 3p1
1s2 2s2 2p6
1s2 2s2 2p6 3s2 3p1
Sodium 2, 8, 1Magnesium: 2, 8, 2Aluminium: 2, 8, 3Silicon: 2, 8, 4Phosphorus: 2, 8, 5Sulphur: 2, 8, 6Chlorine: 2, 8, 7Argon: 2, 8, 8
The full configuration of He 2s2 2p6 is 1s2 2s2 2p6. This configuration represents a neutral oxygen atom with its electrons distributed in the 1s, 2s, and 2p orbitals.
The investigator will find that 1s2 2s2 2p6 is the electron configuration for neon.
1s2, 2s2 2p6, 3s2 3p1or[Ne], 3s2 3p1
The correct full electron configuration for neon (Ne) is 1s2 2s2 2p6.
1s2 2s2 2p6
The complete electron configuration for the chromium(III) ion is 1s22s22p63s23p64s03d3.
1s2 2s2 2p6 3s2 3p6 is the electron configuration of chlorine
The element with the electron configuration 1s2 2s2 2p6 is neon (Ne).
1s2 2s2 2p6 3s2
1s2 2s2 2p6 3s1
1s2 2s2 2p6