Question

Identify the correct sets of entries that are rightly matched.

Column A Column B

(A) Bridge elements (a) Elements of group IA-VIIA

(B) Representative elements (b) 2nd-period elements

(C) Typical elements (c) 7th-period elements

(D) Transition elements (d) 3rd-period elements

(E) Transuranic elements (e) Present in 4th, 5th and 6th periods

• A. $A-b,B-a,C-d,D-e,E-c$
• B. $A-c,B-a,C-b,D-d,E-e$
• C. $A-a,B-c,C-d,D-e,E-b$
• D. $A-c,B-e,C-d,D-b,E-a$

Answer 1

The correct option is A $A-b,B-a,C-d,D-e,E-c$

$\to$ Bridge Elements: $2$nd Period elements are called bridge element because their properties are resemblance to the period $3$ of next group i.e. diagonally.

$\to$ Representative Elements: There are the $s$ & $p-$ block element

$\to$Typical Elements: Are the elements which show the typical property of their respective group i.e. period $3rd$ element.

$\to$Transition element: d-block elements are transition element i.e. $4th,5th$ & $6th$ periods.

$\to$Transuranic Elements: Are the elements which have atomic number greater than $92$. All are highly unstable.

Hence, option $A$ is correct.