BSCI 105 Lecture Notes - Lecture 3: Ionic Bonding, Chemical Polarity, Electronegativity

• School: University of Maryland
• Department: Biological Sciences Program
• Course: BSCI 105
• Professor: Keller

Document Summary

Bsci105 - lecture 3 - chemistry principles part 2. Polar bonds - do not share electrons equally because of their different electronegativity. Hydrogen molecules binds to oxygen, oxygen becomes partially negative and the two hydrogen molecules become partially positive. Ionic bond - bonds where one atom takes the electron from the other. Electronegativities increases from left to right and top to bottom on the periodic table. The more protons you have (the further right you get on the periodic table), the stronger the electrons are held to the nucleus, making them more electronegative. The differences in electronegativity: strong bond weaker weak. Formed when hydrogen atom shared by two electronegative atoms. The hydrogen bond results in a partial negative and partial positive. Central water molecule can join to other water molecules via hydrogen bonds. Hydrophilic molecules are molecules with many polar groups that can interact with water because they have partial positive and negative charges.