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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.
Elements
 The atom is the
__________
unit of an
element that still
exhibits the
properties of
that element.
Atoms consist of:
 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.
Periodic Table of the Elements
Chemical Bonds
 Covalent bonds
 Hydrogen bonds


Ionic bonds
Van der Waals bonds
Ionic and Van Der Waals
 Van Der Waals
Bonds cont…
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.
Organic Chemistry
Chemical Symbols of Representations
Symbol
Represents
C
_________________ atom
____________
Hydrogen atom
N
_________________ atom
O
Oxygen atom
____________
Hydroxyl (alcohol)
NH3
Ammonia
NH2
________________________
____________
Methyl group
COOH
Carboxyl (acid)
Organic Chemistry
 _________________-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