Question

In C, N, O and F the electronegativity

• A. Decreases from carbon to fluorine
• B. Increases from carbon to fluorine
• C. Increases from carbon to oxygen and then decreases
• D. Decreases from carbon to oxygen and then increases

Answer 1

The correct option is B

Increases from carbon to fluorine

Let's take a look at all the elements here, C, N, O and F

What is common here?

Yeah, they all are from the same period.

How does the trend of electronegativity behave along a period?

In a period moving from left to right, the electronegativity increases due to the increase in effective nuclear charge because the atomic radius of the element increases the electronegativity value decreases.

Electronegativity $\alpha$ $\frac{1}{Atomicradius}$

So, from this data, we can say that

C < N < O < F

So, electronegativity increases from carbon to flourine.