Polar bond.
A very common example is H2O.
The oxygen atom has an electronegativity value of about 3.5, while the hydrogen atoms have a value of about 2.2 (each).
Electronegativity describes how “greedy” atoms are with sharing electrons.
Since the oxygen atom has a greater value, it will be more “greedy” with the electrons.
The answer to this question is bohr Greek
Answer:
the surface tension of H20 is 72 dynes/cm at 25°C
