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NEET · Chemistry · STD 11 - 2. structure of atom
\(Be^{2+}\) is isoelectronic with which of the following ions?
- A \(H^+\)
- B \(Li^+\)
- C \(Na^+\)
- D \(Mg^{2+}\)
Answer & Solution
Correct Answer
(B) \(Li^+\)
Step-by-step Solution
Detailed explanation
Isoelectronic species contain same number of electrons. \(B e^{2+}\) contains \(2\) electrons. Among the given options, only \(L i^{+}\) contains \(2\) electrons and therefore, it is isoelectronic with \(B e^{2+}\) \(H^{+} \rightarrow\) no eletron \(N a^{+} \rightarrow 10 e^{-}\) \(L i^{+} \rightarrow 2 e^{-}\)
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