First, we need to add up the number of electrons in the configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10. Doing so gives a result of 30. A neutral element having 30 electrons will also have 30 protons. Checking the Periodic Table, we see that zinc is the element with 30 protons.
What does the element's electronic configuration end with 4s2 3d7.
Zinc, number 30,
complete electron configuration:
1s2, 2s2 2p6, 3s2 3p6 3d10, 4s2 with total 30 electrons
Cobalt has the electron configuration [Ar] 4s2 3d7.
cobalt
The electron configuration of cobalt is [Ar]3d7.4s2.
[Ar] 4s23d7
[Ar] 4s2 3d7
The element with that electron configuration is Iron.
3d11 is not possible, The element with the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 is Selenium (Se).
The electron configuration of cobalt is [Ar]3d7.4s2.
Cobalt has an electron configuration of 1S2 2S2 2P6 3S2 3P6 4S2 3d7 or. [Ar] 4S2 3d7
[Ar] 4s2 3d7 or 2, 8, 15, 2
[Ar] 4s23d7
[Ar] 4s2 3d7
1s2 2s2 2p6 3s2 3p6 3d7 4s2Alternatively,[Ar] 3d7 4s2
Co2+ has 25 electrons with the configuration: [Ar] 4s2 3d5 no its [Ar]3d^7
[Ar] 4s2 3d7
The electronic configuration of cobalt is :1s2 2s2 2p6 3s2 3p6 3d7 4s2 This is so because cobalt has an atomic no of 27. So it will have 27 electrons. The 1st shell can accommodate a maximum of 2 electrons, the 2nd shell can accomodate 8. So that makes it 10, 17 to go. Now the 3s and 3p subshells get filled up with 2 and 6 electrons respectively, but after that instead of the 3d subshell, the 4s subshell gets filled up.(This is so because the 4s subshell has a lower energy level than 3d).So that makes it 20 electrons. The remaining 7 proceed into the 3d subshell to make a total of 27.
1s2 2s2 2p6 3s2 3p6 3d7 4s2Alternatively,[Ar] 3d7 4s2
[Ar] 4s2 3d7
[Ar] 4s2 3d7