We are being asked to determine which of the given set of elements is isoelectronic (same number of electrons) with argon and neon.
___________ is isolectronic with argon and __________ is isolectronic with neon.
a. Cl-, F-
b. Cl-, Cl+
c. F+, F-
d. Ne-, Kr+
e. Ne-, Ar+
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