Lithium atoms have three electrons.
Scandium
Scandium
3d
1s22s22p63s23p64s23d5
B. 1s22s22p63s23p64s23d5----Chromium: [Ar]1s22s22p63s23p63d54s1Manganese: [Ar]1s22s22p63s23p63d54s2
1s2 2s2 2p6 3s2 3p6 4s2 3d5
The only element with 55 protons is caesium. The electron configuration you gave is xenon's. In order to change the configuration to get 55 protons, you need to add a 6s1. Also, you listed the electron groups in the wrong order. Switch 4s and 3d, and switch 5s and 4d.
3d
1s22s22p63s23p64s23d5
A positive ion ( the one that gives the electron) and a negative ion ( the one that accepts).
with some Styrofoam balls glue them together and add ten protons/electron and ten neutrons
B. 1s22s22p63s23p64s23d5----Chromium: [Ar]1s22s22p63s23p63d54s1Manganese: [Ar]1s22s22p63s23p63d54s2
Helium
Lithium
1s2 2s2 2p6 3s2 3p6 4s2 3d5
Hydrogen
The only element with 55 protons is caesium. The electron configuration you gave is xenon's. In order to change the configuration to get 55 protons, you need to add a 6s1. Also, you listed the electron groups in the wrong order. Switch 4s and 3d, and switch 5s and 4d.
Chromium is a 3d element. and cobolt also a 3d element.
No, an electron in the 3d shell can move to the 4s shell very easily.