How would you react to the statement that the electronegativity of N on Pauling scale is 3.0 in all the nitrogen compounds?
The statement is incorrect. The electronegativity of any given element is not constant; it varies depending on the element to which it is bound.
While the Pauling scale assigns an approximate value of 3.0 to nitrogen, this value is not fixed for all nitrogen compounds.
Since electronegativity is not a measurable quantity, the value of 3.0 serves only as an approximate measure of nitrogen's ability to attract shared electrons to itself, rather than a strict constant across all chemical bonds.
Explanation
The textbook explicitly states that the electronegativity of any given element is not constant and varies depending on the element to which it is bound. The value of 3.0 for nitrogen on the Pauling scale is merely an approximate value, not an absolute constant for all its compounds.