Question

Which of the following is not isoelectronic with Ar (1)Ca+ (2)Na2+ (3)Cl- (4)K+? The first answer without spams will be marked as brainliest answer!!

Answer 1

Answer:

Na2+

Explanation:

The answer is Na2+.

This is because Na2+ has 9 electrons whereas Argon has 18 electrons.

Here:-

• Ca+ has 18 e-
• Cl- has 18 e-
• K+ has 18 e-
• Na2+ has 9 e-

Therefore Na2+ is not isoelectric with Argon.

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