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D And F Block Elements

JEE Main 2025 (Online) 22nd January Evening Shift

INTEGER+4 / -12025

Niobium $(\mathrm{Nb})$ and ruthenium $(\mathrm{Ru})$ have " $x$ " and " $y$ " number of electrons in their respective 4 d orbitals. The value of $x+y$ is __________.

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