There are two ways to write the electron configuration of manganese, and the correct way is not agreed on.
Some say it should be written 1s2 2s2 2p6 3s2 3p6 4s2 3d5, but others say the correct way to write it is 1s2 2s2 2p6 3s2 3p6 3d5 4s2.
The disagreement is caused because the 4s sub-shell fills up before the 3d sub-shell. Some believe it is written in the order that the sub-shells fill up and others believe it is written according to the levels of the sub-shells.
The Aufbau principle supports the first way of writing it.
The reasoning for the second way of writing it is complicated, but all you need to know is that once we get to scandium, the energy of the 3d orbitals becomes slightly less than that of the 4s. Therefore in reality, for Sc through to Zn, the third are the lower energy orbitals - not the 4s. It's the same for the rest of the transition series as well.
1s2 2s2 2p6 3s2 3p6 4s2 3d3
The ground state electron configuration for nitrogen is [He]2s2.2p3.
The electron configuration of gallium is: [Ar]3d104s24p1.
The ground state electron configuration of hydrogen is 1s^1, meaning it has one electron in the 1s orbital. Helium in its ground state has an electron configuration of 1s^2, indicating it has two electrons in the 1s orbital. So, the main difference is that hydrogen has one electron in its outer shell while helium has two electrons in its outer shell.
The electron configuration of lead is [Xe]4f14.5d10.6s2.6p2.
The ground-state electron configuration for a neutral atom of manganese is: 1s22s22p63s23p63d54s2 or [Ar]3d54s2
Manganese (Mn) contains 3d5 electrons in its ground state electron configuration.
1s2 2s2 2p6 3s2 3p6 4s2 3d3
The electron configuration of 1s22s22p3s1 is not the ground state electron configuration of any element. This configuration contains 8 electrons, which in the ground state would be oxygen. The ground state configuration of oxygen is 1s22s22p4.
The ground state electron configuration for nitrogen is [He]2s2.2p3.
The ground state electron configuration of bromine is Ar 4s 3d 4p.
The ground-state electron configuration for the V3 ion is Ar 3d2.
The ground state electron configuration for iron (Fe) is Ar 3d6 4s2.
The ground state electron configuration of iron (Fe) is Ar 3d6 4s2.
Ground state electron configuration of zinc (Zn): [Ar]3d104s2.
The ground state electron configuration of Lanthanum is [Xe] 5d1 6s2.
The expected ground-state electron configuration of copper is ; however, the actual configuration is because a full dsubshell is particularly stable. There are 18 other anomalous elements for which the actual electron configuration is not what would be expected.