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Among the species: Ce^(4+), Eu^(2+), Tb^...

Among the species: `Ce^(4+), Eu^(2+), Tb^(4+), Yb^(2+), Sm^(2+), Tm^(2+), Pr^(4+), Nd^(4+)`, find the number of ions which have sufficient stability to be studied in aqueous chemistry.

Text Solution

Verified by Experts

The correct Answer is:
4
`Ce^(4+) rarr (f^(0))`
`Eu^(2+), Tb^(4+) rarr (f^(7))`
`Yb^(2+) rarr (f^(14))`
`sm^(2+) rarr (f^(6))`
`Tm^(2+) rarr (f^(13)`
`Pr^(4+) rarr (f^(1))`
`Nd^(4+) rarr (f^(2))`
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