Question

Arrange the following elements in the order of their increasing nonmetallic character $\mathrm{Li},\mathrm{O},\mathrm{C},\mathrm{Be},\mathrm{F}$.

• A. $\mathrm{F}<\mathrm{O}<\mathrm{C}<\mathrm{Be}<\mathrm{Li}$
• B. $\mathrm{Li}<\mathrm{Be}<\mathrm{C}<\mathrm{O}<\mathrm{F}$
• C. $\mathrm{F}<\mathrm{O}<\mathrm{Li}<\mathrm{Be}<\mathrm{C}$
• D. $\mathrm{F}<\mathrm{O}<\mathrm{Be}<\mathrm{C}<\mathrm{Li}$

Answer 1

The correct option is B

$\mathrm{Li}<\mathrm{Be}<\mathrm{C}<\mathrm{O}<\mathrm{F}$

The explanation for the correct option

(B) $\mathbf{Li}\mathbf{}\mathbf{<}\mathbf{}\mathbf{Be}\mathbf{}\mathbf{<}\mathbf{}\mathbf{C}\mathbf{}\mathbf{<}\mathbf{}\mathbf{O}\mathbf{<}\mathbf{}\mathbf{F}$

The trend of nonmetallic character:

• Nonmetallic character increases across a period on moving from left to right in the periodic table.
• This occurs as a result of an atom's increasing number of electrons and protons as it moves from left to right in a period.
• Due to the increased nuclear force on the electrons, as a result, losing electrons becomes difficult.
• It decreases on moving down in the group in the periodic table.
• One moving down the group, atomic radius increases, making things easier to lose electrons.
• Chlorine and oxygen are the most electronegative elements.

Order of nonmetallic character

• The non-metallic character is an element's tendency to accept electrons and form negative ions or anions.
• The modern periodic table's second period, which contains li and beryllium, is on the left.
• Fluorine is a chemical element that is right next to Neon.
• After oxygen, beryllium, carbon, and lithium, fluorine exhibits the most non-metallic characteristics.
• The order of nonmetallic character is as follows:

$\mathrm{Li}<\mathrm{Be}<\mathrm{C}<\mathrm{O}<\mathrm{F}$

The explanation for incorrect options

• The order of nonmetallic character is $\mathrm{Li}<\mathrm{Be}<\mathrm{C}<\mathrm{O}<\mathrm{F}$.
• Hence all other options (A), (C) and (D) are incorrect.

Therefore, the correct option is (B) $\mathbf{Li}\mathbf{}\mathbf{<}\mathbf{}\mathbf{Be}\mathbf{}\mathbf{<}\mathbf{}\mathbf{C}\mathbf{}\mathbf{<}\mathbf{}\mathbf{O}\mathbf{<}\mathbf{}\mathbf{F}$.