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प्रश्न
Which among the following elements has highest ionisation enthalpy and bears a diagonal relationship with aluminium?
पर्याय
Magnesium
Lithium
Calcium
Beryllium
MCQ
उत्तर
Beryllium
Explanation:
4Be = 1s2 2s2
Beryllium's electrical configuration is stable. Because it takes more energy to remove an electron from this stable form, be has the highest ionisation enthalpy.
| Period | Gr. 2 | Gr. 13 |
| 2 | Be | B |
| 3 | Mg | Al |
Properties of Be and Al are similar and due to this they bear diagonal relationship.
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