Food and Chemistry

Objectives  Describe chemical properties.  Name 3 most important elements to life.  Explain how covalent, hydrogen, and ionic bonds are formed.  Define a molecule.  Identify symbols for hydroxyl, amino, ammonia, methyl, and carboxyl.  Discussion oxidation-reduction reactions.  Describe the two divisions of metabolism.  Describe chemical properties.  Name 3 most important elements to life.  Explain how covalent, hydrogen, and ionic bonds are formed.  Define a molecule.  Identify symbols for hydroxyl, amino, ammonia, methyl, and carboxyl.  Discussion oxidation-reduction reactions.  Describe the two divisions of metabolism.

Elements  The atom is the __________ unit of an element that still exhibits the properties of that element.

Atoms consist of:  Nucleus  ___________  ____________  Electrons  Nucleus  ___________  ____________  Electrons

Atomic Number  The atomic number of an atom is the total number of ________________.  The atomic weight of an atom is the total number of protons plus ______________.  Chemical properties of an element are determined by the number of electrons in the _____________ energy level of an atom.  The atomic number of an atom is the total number of ________________.  The atomic weight of an atom is the total number of protons plus ______________.  Chemical properties of an element are determined by the number of electrons in the _____________ energy level of an atom.

Periodic Table of the Elements

Chemical Bonds  Covalent bonds  Hydrogen bonds  Ionic bonds  Van der Waals bonds  Covalent bonds  Hydrogen bonds  Ionic bonds  Van der Waals bonds

Ionic and Van Der Waals  Van Der Waals

Bonds cont…

Molecules  Molecules are the ________________ identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that _______________.

Oxidation-Reduction  Oxidation can be defined very simply as the ____________ of oxygen.  Reduction can be defined as the ____________________ of oxygen  _____________________________________  Process of ____________________________  Life processes that produce or use ________________________

Metabolism  Metabolism refers to all the _____________ reactions that occur in a living system. ____________________, or reactions involving the synthesis of compounds. ____________________, or reactions involving the breakdown of compounds.  Metabolism refers to all the _____________ reactions that occur in a living system. ____________________, or reactions involving the synthesis of compounds. ____________________, or reactions involving the breakdown of compounds.

Organic Chemistry Chemical Symbols of Representations SymbolRepresents C_________________ atom ____________Hydrogen atom N_________________ atom OOxygen atom ____________Hydroxyl (alcohol) NH3Ammonia NH2________________________ ____________Methyl group COOHCarboxyl (acid)

Organic Chemistry  _________________-containing molecules  All carbon atoms have ___________ bonds  Each carbon can connect to: Another carbon A hydroxy An ______________________ group An _____________________ (double bond)  _________________-containing molecules  All carbon atoms have ___________ bonds  Each carbon can connect to: Another carbon A hydroxy An ______________________ group An _____________________ (double bond)

Common Hydroxy Acids

Reduction - Oxidation