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anonymous
 one year ago
4.What is the electron configuration of the element with 27 protons? please me
anonymous
 one year ago
4.What is the electron configuration of the element with 27 protons? please me

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I put 3 and it wasn't right

Photon336
 one year ago
Best ResponseYou've already chosen the best response.2Have to start like this 1s^2 2s^2 2^p^6 3s^2 3p^6 4s^2 3d^7 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 have 8. So that makes it 10, 17 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 get a total of 27.
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