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)
Na+ has 10 electrons and is isoelectronic with neon. Cl- has 18 electrons and is isoelectronic with argon.
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)
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.
Na+ has 10 electrons and is isoelectronic with neon. Cl- has 18 electrons and is isoelectronic with argon.
No noble gas is isoelectronic with the element chlorine. But argon is isoelectronic with the chloride ion.
Neon, Ne.
Oxide ion O2- is isoelectronic with neon.
S2- ion is isoelectronic with argon (with 18 electrons).
Magnesium element has no relation with noble gas. But Mg2+ ions and noble gas neon are isoelectronic.