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Question
Be 2+ is isoelectronic with which of the following ions:
Options
H+
Li+
Na+
Mg2+
MCQ
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Solution
Li+
Explanation:
Because they both have 2 electrons
| Be = | 4, | ⌉⌊ | ⌉⌊ |
| 1s2 | 2s2 |
| Be2+ = | 4, | ⌉⌊ |
| 1s2 |
| Li = | 3, | ⌉⌊ | ⌉ |
| 1s2 | 2s1 |
| Li+ = | 3, | ⌉⌊ |
| 1s2 |
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Isoelectronic Species
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