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নিচের কোন আয়নটি o2- এর সম-ইলেকট্রন বিশিষ্ট? (Which ion of the following has the same number of electrons as an o2- ion?) 

নিচের কোন আয়নটি o2- এর সম-ইলেকট্রন বিশিষ্ট? (Which ion of the following has the same number of electrons as an o2- ion?)  সঠিক উত্তর Mg2+

আমরা জানি অক্সিজেনের ইলেক্ট্রন সংখ্যা ৮ । অক্সিজেন আরও দুটি ইলেক্ট্রন গ্রহণ করে ঋণাত্মক আধান বিশিষ্ট হয় এবং এর ইলেক্ট্রন সংখ্যা হয় ১০।অপরদিকে মেগনিশিয়াম এর ইলেক্ট্রন সংখ্যা ১২ এবং তা দুইটি ইলেক্ট্রন ত্যাগ করে ধনাত্মক আয়নে পরিণত হয় এবং এর ইলেক্ট্রন সংখ্যা হয় ১০ । যা O^2- এর সমান। তাই Mg^2+ আয়নটি O^2- এর সম ইলেকট্রন বিশিষ্ট।

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