Question

Write down the full electronic configurations for the ions

(a)Os2+

(b) At–.

Answer 1

The electronic configuration of

$Os^{2+}$ is $[Xe]4f^{14}5d^66s^2$

$At^-$ is $[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵$