Presentation on theme: "Opener Recall: what is Electronegativity? Where can you find it?"— Presentation transcript:
1 Opener Recall: what is Electronegativity? Where can you find it? What is the electronegativity of O? What do you know about the bonds oxygen molecules make in O2(g) ?What are the electronegativities of H and Cl?Based on what you now know about bonding, what do you anticipate might happen with HCl?
5 Water Water has two polar covalent bonds The oxygen atom has a higher electronegativity than the hydrogen, so pulls the shared electron towards itself more than the hydrogen
6 Polar Covalent Bonds Since the electron spends more time around the Cl nucleus,the Cl gains a partial negative charge,and the H gains a partial positive chargeThis is indicated in each diagram using the δ
8 Determining PolarityWe use electronegativity of each element to determine if a bond is polarIt is the difference in electronegativity that is importantCheck : what is the difference in electronegativity ofH-F C-H P-Cl
9 Bond ContinuumAn ionic bond is just an extreme polar covalent bond where the electron has been transferred from one atom to anotherDifference in electronegativty0.41.8PureCovalentPolar CovalentIonic