Electronic configurations of transition elements

Electron configurations of transition elements end with ns (n-l)d. Its group number is equal to the total number of electrons in those shells. But this rule does not work for the elements with more than 8 electrons in those shells. In such cases, if the total number of electrons is equal to 9 or 10, the element is in 8B. If it is equal to 11, the element is in IB and if it is equal to 12, the element is in the 2B group. 

Complex metal hydride solid-state compound containing homoleptic, anionic metal-hydrogen complexes d, d, d etc electron configuration of transition element h.H enthalpy of hydride formation as determined from pressure-composition isotherms during desorption by using van t Hoff s method... 

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