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Mastering Bio Ch. 3

Study cards for Dr. Day's Survey of Biology at Clayton State

QuestionAnswer
Nonpolar covalent bonds Electrons are shared equally
Polar covalent bonds More electronegative atom has stronger hold on electron creating a partial charge
Ionic bonds Strong atom strips away electron, creating cations and anions
Hydrogen bonds Hydrogen partially bonds to highly negative molecues, usually O, N, or F
What is "Brownian Motion" Random movement of molecules
Emergent properties of water: Cohesion & Adhesion, Moderation of temperature, Expansion upon freezing, Versatility as a solvent
What is "heat"? The total amount of energy associated with the movement of atoms and molecules in a body of matter.
What is "temperature"? Measures the intensity of heat (average speed of all the molecules in a body)
Define "solvent" The dissolving agent. For life, usually water.
Define "solute" The substance that is dissolved.
What is an "acid"? Compound that contributes H+ or removes OH- from an aqueous solution.
What is a "base"? Compound that removes H+ or contributes OH- to an aqueous solution.
What is "pH"? Potential of Hydrogen
What is the pH of normal human blood? 7.4, slightly alkaline.
What is the pH scale? 0-14 (acid -> alkaline), 7 is neutral.
Created by: ghouliegrrrl
 

 



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