In C, N, O and F the electronegativity
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 α 1AtomicradiusSo, from this data, we can say that
C < N < O < F
So, electronegativity increases from carbon to flourine.