If you go backwards two elements, you will find Neon (Ne). If you go forwards six, you will find Argon (Ar).
Mg2+ ion and the noble gas, neon are isoelectronic
Calcium is not isoelectronic with any noble gas. Ca2+ ion is isoelectronic with argon (with 18 electrons).
There is no noble gas that has the the same electron arrangement as Mg- ion. However Mg2+ ion and the noble gas neon (Ne) are isoelectronic
Ba2+ has the same electron configuration as Xenon, Xe
Mg2+ and the noble gas neon, both have 10 electrons. Hence both of them have the same electronic configuration.
Ne
(Neon)
neon
[Ne] 3s2
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
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.
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
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.
(Ar) Argon because Ca ion is Ca2+ so it give away 2 electrons
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.