It is not sodium. If you drop hot molten sodium into water it flashes and violently reacts with water but does not quite explode like the molten sodium chloride. It most likely is not ... If you check the PH afterexplosion, water is still neutral PH.
BUT because sodium chloride is table salt. your answer is false!
B) 3 because there are three numbers
Answer: A) H-H is least polar
Explanation:
Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself. The more is the difference in electronegativity, the more polat the bond is.
1. H-H : Electronegativity difference = electronegativity of hydrogen - electronegativity of hydrogen =2.1 -2.1= 0
2. H-Cl : Electronegativity difference = electronegativity of chlorine - electronegativity of hydrogen = 3-2.1 = 0.9
3. H-F : Electronegativity difference = electronegativity of fluorine - electronegativity of hydrogen= 4-2.1= 1.9
4. H-I : Electronegativity difference = electronegativity of iodine - electronegativity of hydrogen= 2.5 -2.1= 0.4
Thus the least electronegativity difference between the bonded atoms is in H-H , this is least polar.
Diagram C shows a balanced chemical equation because it has equal number of atoms on both sides of the equation.
