Isoelectronic Configurations of Atoms and Ions
Argon has atomic number of 18 (Z = 18). ... We say that that the chloride ion is isoelectronic with the argon atom. It is also possible for cations, positively charged ions, to be isoelectronic with the argon atom in its ground state.
Which of these would be isoelectronic with an argon atom?
Calcium ions with a +2 are isoelectronic with Argon.
Sulfur has 16 electrons.
Are argon and neon isoelectronic?
The answer is option A. Cl- is isoelectronic with argon and F- is isoelectronic with neon.