Correct the errors in the following? a) #1s^2 2s^3 2p^7# b) #1s^2 2s^2 3p^6 3s^2 3d^8# c) #1s^3 2s^2 2p^6 3s^2 3p^5 4s^1# d) #1s^1 2s^2 2p^6 3s^2 3p^6 3d^7#
1 Answer
Feb 23, 2018
the first one will be
#2s# and#2p# orbital can each have a maximum of#2# electrons. We keep the same number of electrons, so we promote the two extra ones to the next orbital up.
2nd one will be
(following normal energy ordering)
Next one will be
(again following the Aufbau principle of filling the orbitals,you can't have one electron in
#4s# without filling the vacant spaces in#3p# , and#1s# can have a maximum of#2# electrons)
And the last one
(
#1s# can accommodate a maximum of#2# electrons, which must be filled first before filling#2s# )