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Which of the following lanthanide ion has 7 electrons in its outer shell? (Memory Based JEE Mains 22/01/2025 Shift-1)

Q1

Which of the following lanthanide ion has 7 electrons in its outer shell?

(Memory Based JEE Mains 22/01/2025 Shift-1)

a

\({\mathrm{Eu}}^{+3}\)

b

\({\mathrm{Gd}}^{+3}\)

c

\({\mathrm{Sm}}^{2+}\)

d

\({\mathrm{Gd}}^{+2}\)

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