BSC 228 Lecture Notes - Lecture 2: Single Bond, Peptide, Cell Nucleus
25 Aug 2016
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Document Summary
Compound- what you get when you combine two different elements. Compounds have different properties than their original elements. Share electrons between elements; this forms the basis of chemical bonds. Covalent- electrons shared between two atoms (ex: h20) Ionic bond- electrons from atom are transferred to another atom (ex: nacl) Hydrogen bond- weak bond between a hydrogen atom and a negative atom. Ions- an atom that has a charge because it has lost or gained electrons. Some bonds are stronger than others, thus some molecules are more stable than others. Certain types of molecules and atoms are attracted to some molecules and atoms, but not to others. Configuration of molecules with the same number and types of atoms can be different. Concentration of hydrogen ions in a solution ph= -log[h+] When the number in [h+] is high, the ph is low. Disaccharide- sucrose and water molecule from two monosaccharides glucose and fructose. Water used to make and break covalent bonds.
