Classification Of Elements And Periodicity In Properties Question 16
Question 16 - 2024 (31 Jan Shift 2)
Consider the following elements.
Group $\Bigg\downarrow \begin{aligned} & A^{\prime} B^{\prime} \rightarrow \text { Period } \\ & C^{\prime} D^{\prime}\end{aligned}$
Which of the following is/are true about $A^{\prime}, B^{\prime}, C^{\prime}$ and $D^{\prime}$ ?
A. Order of atomic radii: $B^{\prime}<A^{\prime}<D^{\prime}<C^{\prime}$
B. Order of metallic character: $B^{\prime}<A^{\prime}<D^{\prime}<C^{\prime}$
C. Size of the element: $D^{\prime}<C^{\prime}<B^{\prime}<A^{\prime}$
D. Order of ionic radii : $B^{\prime+}<A^{\prime+}<D^{\prime+}<C^{\prime+}$
Choose the correct answer from the options given below :
(1) A only
(2) A, B and D only
(3) A and B only
(4) B, C and D only
Show Answer
Answer (2)
Solution
In general along the period from left to right, size decreases and metallic character decrease.
In general down the group, size increases and metallic character increases.
$B^{\prime}<A^{\prime}($ size $) \quad C^{\prime}>A^{\prime}($ size $)$
$D^{\prime}<C^{\prime}($ size $) \quad D^{\prime}>B^{\prime}($ size $)$
$B^{\prime}<A^{\prime}$ (metallic character)
$D^{\prime}<C^{\prime}$ (metallic character)
$B^{\prime+}<A^{\prime+}($ size $)$
$D^{\prime+}<C^{\prime+}($ size $)$
$\therefore$ C statement is incorrect.
BETA
