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निम्नलिखित जटिल यौगिक में रेखित परमाणु का प्रभावी परमाणु क्रमांक ज्ञात करो-
`[Cr(NH_(3))_(6)]Cl_(3)`

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प्रभावी परमाणु क्रमांक =Cr का परमाणु क्रमांक `-Cr^(3+)` के निर्माण में दिए गए इलेक्ट्रॉन `+6xxoverset(cdot cdot)NH_(3)` से ग्रहण इलेक्ट्रॉन `=24-3+6xx2=33`

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