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1s2 2s2 2p6 3s2 3p6 4s1
Iodine is the element with that configuration.
It is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6.
5
I: [kr] 5s^2 4d^10 5p^5
1s22s2
1s22s1
1s2 2s2 2p6 3s1
1s2 2s2 2p6 3s2 3p6 4s1
Iodine is the element with that configuration.
[Kr]
It is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6.
1s22s2
Iodine accepts one electron to achieve noble gas configuration. Strontium loses two electrons to achieve noble gas configuration. Nitrogen accepts three electrons to achieve noble gas configuration. Krypton already has a noble gas configuration.
1s22s22p63s23p64s2 3d104p65s24d105p5
No, iodine has 5 electron shells. It has a total of 53 electrons and its electron configuration is [Kr] 5s2 4d10 5p5, indicating that it has 4 electron shells.
Iodine gains 1 electron to fill it's shell.