Question

The properties of $Li$ are similar to those of $Mg$. This is because:

• A. both have nearly the same size.
• B. both has their charge to size ratio nearly the same.
• C. both have similar electronic configurations.
• D. both are found together in nature.

Answer 1

The correct option is B both has their charge to size ratio nearly the same.

• The properties of lithium are similar to those of $Mg$ because they are having diagonal relationship.
  
• The elements having diagonal relationship show similar properties and the reason is because the both of them will have similar electronegativity and polarising power i.e. charge per size ratio of both the elements are nearly the same.