Question

The electron affinity of Be is similar to ___________.

• A. He
• B. B
• C. Li
• D. Na

Answer 1

The correct option is A He

$He$ being noble gas has complete 1 st shell It has completed its duplet. While $Be$ Has electronic configuration $1s^2$,$2s^2$ so be also has completely filled $2s$ subshell so we can say that, The electron affinity of $Be$ is similar to $Be$ among the given options.