Question

Arrange the elements mentioned below in the order of maximum:

(A) Metallic character (B) Electronegativity

(C) Ionization energy (D) Electron affinity

(i) A belongs to the first period and the $18$^th group.

(ii) B belongs to the $6$^th period and the first group.

(iii) C belongs to the third period and the $17$^th group.

(iv) D belongs to the second period and $17$^th group.

• A. BDAC
• B. BDCA
• C. DBAC
• D. DBCA

Answer 1

The correct option is A

BDAC

Explanation for correct option: a)

1. The element which belongs to sixth period and $1$^st group is cesium and it has high metallic character.
2. It is the element fluorine that belongs to the second period and $17$^th group and it is the most electronegative element.
3. Helium is the element that belongs to the first period and the $18$^th group and it has high ionization energy due to its completely filled electronic configuration.
4. It is the element chlorine which belongs to the third period and the $17$^th group and it has high electron affinity due to its large atomic radius.

Explanation for incorrect options:

b) Here the given order BDCA is not correct. The element with maximum metallic character is B, an element with maximum electronegativity is D, an element with maximum ionization energy is A and the element with maximum electron affinity is C.

c) The correct order is BDAC and the given order DBAC is not correct.

d) The element with maximum metallic character is B, an element with maximum electronegativity is D, an element with maximum ionization energy is A and the element with maximum electron affinity is C. The given order is not correct.

Hence option (a) is correct and the correct order is BDAC.