Not a neutral Cl atom but the chloride ion Cl- is isoelectronic with the noble gas argon.
argon and S2- are isoelectronic
None. However, the noble gas helium is isoelectronic with Li+ ion (and not with Li element)
oxide ion is isoelectronic with neon.
Argon is isoelectronic with the sulfide ion.
The noble gas neon (Ne), is isoelectronic with N3- ion (not N atom)
Not a neutral Cl atom but the chloride ion Cl- is isoelectronic with the noble gas argon.
argon and S2- are isoelectronic
None. However, the noble gas helium is isoelectronic with Li+ ion (and not with Li element)
oxide ion is isoelectronic with neon.
Argon is isoelectronic with the sulfide ion.
None. The Se2- ion is isoelectronic with Krypton.
No noble gas is isoelectronic with the element chlorine. But argon is isoelectronic with the chloride ion.
Magnesium element has no relation with noble gas. But Mg2+ ions and noble gas neon are isoelectronic.
Oxide ion O2- is isoelectronic with neon.
S2- ion is isoelectronic with argon (with 18 electrons).
Ca2+ is isoelectronic with the noble gas, Argon. F-, Mg2+ are isoelectronic with the noble gas, Neon. I- is isoelectronic with the noble gas, Xenon