Question

Identify from the following the isoelectronic species:

Ne, O^2-, Na⁺ OR Ar, Cl^2-, K^⊕

Answer 1

Atoms and ions having the same number of electrons are isoelectronic

Species and  No. of electrons

• Ne =10
• O^2- 8 + 2 = 10
• Na⁺ 11 − 1 = 10
• Ar 18
• Cl^2- 17 + 2 = 19
• K^⊕ 19 − 1 = 18

 

Ne, O^2-, Na⁺ are isoelectronic species.