Element Be shown diagonal relationship with

Options

A. `Mg`
B. `Si`
C. `A1`
D. `B`

Answer

C

Explanation

`Be`and `A1` show a diagonal relationship because `Be^(2+)` and `A1^(3+)` ions posses similar charge per unit area:
`("Ionic charge")/((4)/(3)pi("ionic radius")^(2))`