Which element has the greatest electronegativity?NaHOFCl

The element with the greatest electronegativity in the list provided (Na, H, O, F, Cl) is Fluorine (F).

Here's a step-by-step explanation:

1. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. The Pauling scale is the most commonly used electronegativity scale, and it ranges from 0.7 (for francium, the least electronegative element) to 4.0 (for fluorine, the most electronegative element).

2. Looking at the elements you provided, we can check their electronegativities on the Pauling scale:

   • Sodium (Na): 0.93
   • Hydrogen (H): 2.20
   • Oxygen (O): 3.44
   • Fluorine (F): 3.98
   • Chlorine (Cl): 3.16

3. From these values, we can see that Fluorine (F) has the highest electronegativity (3.98) among the elements listed. Therefore, Fluorine is the element with the greatest electronegativity in your list.