Calcium, or Ca
Magnesium
1s2 2s2 2p6 3s2 3p3 is the electron configuration of element 15.
Argon
Argon
The element with the electron configuration 1s2 2s2 2p6 is neon.
Phosphorus has the above electron configuration. It has 15 electrons and protons.
That is the element phosphorous
3d11 is not possible, The element with the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 is Selenium (Se).
This chemical element is neon (Ne).
The investigator will find that 1s2 2s2 2p6 is the electron configuration for neon.
1s2 2s2 2p6 3s2 3p3.
1s2 2s2 2p6 3s2 3p 4s2