Question

$Be$ and $Al$ have following resemblance due to the diagonal relationship:

• A. have nearly equal electronegativity
• B. form amphoteric oxides
• C. both form dimeric halides
• D. all of the above

Answer 1

Answer: (D)

all of the above

Option $\left(D\right)$ is correct.

$Be$ and $Al$ have resemblance due to the diagonal relationship, they have nearly equal electronegativity, small size and availability of only four orbitals in the valence shell. They both form amphoteric oxides and dimeric halides.