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Ch. 2 Biochem
Biology
71
Biology
9th Grade
01/19/2010

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Term
atom
Definition
basic building block of all matter
Term
matter
Definition

anything that has mass and volume

-living or nonliving

Term
three parts of the atomic stucture
Definition

  1. protons
  2. neutrons
  3. electrons

Term
protons (sign and definition and location in atom)
Definition

p+

positive charge

found within the nucleus of an atom

Term
neutrons (sign and definition and location in atom)
Definition

n0

no charge

found within the nucleus of an atom

Term
electrons (sign and definition and location in atom)
Definition

e-

negative charge

found swirling around the nucleus

Term
electron cloud
Definition
energy levels where electrons travel
Term
how do you find the number of protons in an atom?
Definition
the atomic number
Term
how do you find the number of electrons in an atom?
Definition
atomic number
Term
how do you find the number of neutrons in an atom?
Definition
atomic mass - atomic number
Term
maximums of the first three e- energy levels
Definition

  1. 2e-
  2. 8e-
  3. 8e- OR 18e-

Term
six essential elements
Definition
C H N O P S K Na Cl Mg Ca Fe
Term
C
Definition
Carbon
Term
H
Definition
Hydrogen
Term
N
Definition
Nitrogen
Term
O
Definition
Oxygen
Term
P
Definition
Phosphorus
Term
S
Definition
Sulfur
Term
K
Definition
Potassium
Term
Na
Definition
sodium
Term
Cl
Definition
chlorine
Term
Mg
Definition
magnesium
Term
Ca
Definition
Calcium
Term
Fe
Definition
iron
Term
valence electrons
Definition
determine reactivity of an atom
Term
atoms with 1-3 valence electrons tend to...
Definition
lose all valence electrons
Term
atoms with 4 valence electrons tend to...
Definition
share their valence electrons
Term
atoms with 5-7 valence electrons tend to...
Definition
gain as many valence electrons as needed to satisfy the octet rule
Term
when atoms become stable they have...
Definition
achieved either the octet rule or the duet rule
Term
purpose of the octet and duet rules
Definition
to stabilize atoms
Term
covalent bond
Definition
sharing of electrons to hold atoms together
Term
ion
Definition
a charged particle
Term
ionic bonds
Definition
result from the transfer of of valence electrons
Term
element
Definition
pure substance (only one kind of atom)
Term
isotope
Definition
electrons with a different number of neutrons
Term
an example of an isotope
Definition

heavy hydrogen

(normal hydrogen has 0 neutrons, heavy hydrogen has 1)

Term
4 uses of isotopes
Definition

  1. radio isotopes used in cancer treatment
  2. radio carbon dating of fossils
  3. kill bacteria on food
  4. radio isotopes used to "trace" movement throughout the body

Term
simple formulas
Definition
show number of atoms and the types of atoms
Term
structural formulas
Definition
show number, kind, and arrangement of atoms in space
Term
dissociation
Definition
ions separate fro one another in solution
Term
example of dissociation
Definition
when NaCl (salt) enters H20 (water) the Na+ and the Cl- break apart from eachother
Term
acid
Definition
a solution where the hydrogen ions are greater than hydroxide ions
Term
base
Definition
solution where the hydrogen ions are in lesser concentrations than hydroxide ions
Term
between acids and bases
Definition
neutral solutions
Term
chemical change
Definition
rearrangement of atoms resulting in new products with their own physical and chemical properties
Term
law of conservation of matter
Definition
states that matter can not be created nor destroyed, only rearranged into another form 
Term
organic chemistry
Definition
must contain carbon
Term
signs for covalent bonds
Definition

single covalent bond C-C

double covalent bond C=C

triple covalent bond (has three lines between the two Cs)

Term
isomers
Definition
have the same simple formula, but different structures
Term
major 4 organic compounds
Definition

  1. carbohydrates
  2. lipids
  3. proteins
  4. nucleic acids

Term
main source of energy
Definition
carbohydrates
Term
building blocks of carbohydrates
Definition
monosaccharides
Term
glucose + fructose =
Definition
sucrose
Term
simple formula for a monosaccharide
Definition
C6H12O6
Term
simple formula for a disaccharide
Definition
C12H22O11
Term
simple formula for a polysaccharide with 3 sugars
Definition
C18H32O16
Term
define lipid and give 2 examples
Definition

stored energy source

fats and oils

Term
building blocks of lipids
Definition
glycerol and 3 fatty acid
Term
saturated fats
Definition
single covalent bond hydrogen bonds
Term
unsaturated fats
Definition
double covalent bonds with hydrogen and oxygen
Term
lipids are also known as
Definition
triglycerides
Term
what is always found in a protein that is not found in lipids and carbohydrates
Definition
nitrogen
Term
building blocks of proteins
Definition
amino acids
Term
protein structure is determined by 
Definition

  1. number of AA
  2. kind of AA
  3. arrangement of AA

Term
structure of protein determines
Definition
function
Term
catalyst
Definition
speeds up chemical reactions without changing the product
Term
joining amino acids
Definition
by covalent peptide bonds
Term
joining of several amino acids
Definition
polypeptides
Term
example of a nucleic acid
Definition
DNA
Term
building blocks of nucleic acids
Definition
nucleotides
Term
makeup of a nucleotide
Definition

  1. 5 carbon sugars
  2. PO4
  3. nitrogenous - base

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