engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Chemistry Structure of Atom Atomic Structure

समान इलेक्ट्रॉनिक विन्यास वाले आयनों का युग्म __________ है।

1
Cr3+, Fe3+
2
Fe3+, Mn2+
3
Fe3+, Co3+
4
Sc3+, Cr3+
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