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K+ and argon have the same electron configuration
[Ar]3d104s24p6
Potassium must lose one electron (to have the same configuration as the noble gas argon), and fluorine must gain one electron (to have the same configuration as neon)
They have the same electron configuration as argon, which means they are isoelectronic with argon.
They all have the same electron configuration as the noble gas argon.
K+ and argon have the same electron configuration
argon atom
Argon
argon
[Ar]3d104s24p6
They have the same electron configuration as argon, which means they are isoelectronic with argon.
N3- , O2- , F- , Na+ , Mg2+ , Al3+ all have the same electron configuration as Neon.
Sulfur needs to gain 2 electrons to have the electon configuration of Argon
Potassium must lose one electron (to have the same configuration as the noble gas argon), and fluorine must gain one electron (to have the same configuration as neon)
They have the same electron configuration as argon, which means they are isoelectronic with argon.
They have the same electron configuration as argon, which means they are isoelectronic with argon.
Answering by example: Cl- ion, Ar atom, K+ and Ca2+ ions are all 'iso-electronic' to each other, because they all have the same 20 electrons in the same (noble gas) electron configuration (structure) as argon has: [Ar] = [1s2, 2s2 2p6, 3s2 3p6]