Silicon.
1s2, 2s2 2p6, 3s2 3p1or[Ne], 3s2 3p1
1s2 2s2 2p6
Argon
That is the element phosphorous
It is 1s2 2s2 2p6 3s2 3p6
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.
Neutral calcium's electron configuration is 1s2 2s2 2p6 3s2 3p6 4s2. Ca2+ is the ion of calcium, which means that it has 2 less electrons than neutral calcium. Therefore, its electron configuration is 1s2 2s2 2p6 3s2 3p6.
1s2 2s2 2p6 3s2 3p6 is the electron configuration of chlorine
Magnesium
1s2 2s2 2p6
1s2 2s2 2p6 3s1
Silicon.
1s2 2s2 2p6 3s2 3p6
1s2 2s2 2p6 3s2 3s5
1s2 2s2 2p6 3p6 4s2