Question

Beryllium differs in properties from other elements of its own group but shows resemblance with aluminium because of:

• A. relatively bigger ionic radius and high polarising power of $Be$
• B. relatively smaller ionic radius and high polarising power of $Be$
• C. relatively bigger ionic radius is the only reason behind this
• D. none of the above

Answer 1

Answer: (B)

relatively smaller ionic radius and high polarising power of $Be$

Due to relatively smaller ionic radius and high polarising power, Be differs in properties from other elements of its own group. Polarising powers of $B{e}^{2+}$ and $A{l}^{3+}$. ions are almost the same, thus they show similarities in their properties.