Question

The lanthanide element that has the electronic configuration, $[Xe]4f^{7}5d^{1}6s^2$ is

• A. lutetium
• B. terbium
• C. ytterbium
• D. gadolinium

Answer 1

Answer: (D)

The atomic number of gadolinium ($Gd$) is $64$ and its electronic configuration is as
$Gd(64):[Xe]4f^{7}5d^{1}6s^2$