1.

The sum of the first three ionization energies of the lanthanoides Ce, Eu, Gd, Yb, Lu is

Answer»

`CE gt E gt Fe gt Yb gt Lu`
`Yb gt Lu gt E ugt GD gt Ce`
`Yb gt Eu gt Gd gt Ce`
`Yb gt Eu gt Lu gt Gd gt Ce`

Solution :From left to RIGHT


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