[Kr] 5s1
Rubidium (Rb) has a +1 ion, will have the same electron configuration as krypton (Kr) because the +1 status means it has lost an electron. The configuration is written 1s22s22p63s23p64s23d104p6.
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 Rb+1 or Kr
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Rb has the electronic config. of = [Kr] 5s1
1s2 2s2p6 3s2p6d10 4s2p6 5s1
In the Rb atom, the electron configuration is [Kr]5s^1. This means there is 1 electron in the 5s sublevel of the Rb atom.
The charge for Rubidium (Rb) is typically +1, as it tends to lose one electron to achieve a stable electron configuration.
Rubidium's atomic number is 37. Thus, neutral rubidium has 37 protons and 37 electrons. The electron configuration for the first 37 electrons looks like 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1.
Rubidium is a metal element. There are 37 electrons in a single atom.
Rubidium (Rb)
Na, Rb, Al3+, and S2- do not have a noble gas configuration as they do not have the complete outer shell of electrons like a noble gas. O2, Br, Ca, and O2- have noble gas configurations as they either have a complete outer shell of electrons or have gained/lost electrons to achieve a stable noble gas configuration.