(Ar) Argon because Ca ion is Ca2+ so it give away 2 electrons
Krypton is the noble gas that is isoelectronic with Calcium. Both elements have 20 electrons, with Calcium having the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 and Krypton having the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10.
Argon is isoelectronic with the sulfide ion.
None. The Se2- ion is isoelectronic with Krypton.
The noble gas that is isoelectronic with the oxide ion O2 is neon (Ne). Both the oxide ion O2 and the neon atom have 10 electrons.
The noble gas that is isoelectronic with an aluminum ion is neon. Both the aluminum ion (Al^3+) and neon have 10 electrons.
Krypton is the noble gas that is isoelectronic with Calcium. Both elements have 20 electrons, with Calcium having the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 and Krypton having the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d10.
Argon is isoelectronic with the sulfide ion.
None. The Se2- ion is isoelectronic with Krypton.
The noble gas that is isoelectronic with the oxide ion O2 is neon (Ne). Both the oxide ion O2 and the neon atom have 10 electrons.
The noble gas that is isoelectronic with an aluminum ion is neon. Both the aluminum ion (Al^3+) and neon have 10 electrons.
The noble gas neon (Ne), is isoelectronic with N3- ion (not N atom)
Oxide ion (O2-) is isoelectronic with neon. Both species have the same number of electrons, which is 10.
None. However, the noble gas helium is isoelectronic with Li+ ion (and not with Li element)
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.
Mg2+ and neon are isoelectronic
S2- ion is isoelectronic with argon (with 18 electrons).