CHEMISTRY OF LIFE REVIEW
True or False
• Matter (atoms) obey the same rules of
chemistry whether they are in living or non
living things.
FILL IN THE BLANK
• If we take a living thing apart, we eventual end
up with ____________
MULTIPLE CHOICE
• Life builds from atoms to form many levels of
organization. What happens at each new
level?
A. A vital force becomes apparent
B. Rules of chemistry change
C. New properties emerge
D. Nothing changes
LIST
• LIST 12 LEVELS OF BIOLOGICAL
ORGANIZATION
FILL IN THE BLANK
All living and non-living things are composed
________________. HINT-takes up space and
has mass
SHORT ANSWER
• Where do living things get there matter from?
SHORT ANSWER
• Why must matter be recycled?
FILL IN THE BLANK
• Matter is composed of ______________
• HINT-A pure substance that can’t be broken
down any further by ordinary chemical means
LIST
• What are the six elements that make up 98%
of living things?
SHORT ANSWER
• How can you CHNOPS to evolution?
FILL IN THE BLANK
• 3-4 different types of CHNOPS elements
combine to make the ______________
of living things. HINT-Two or more different
elements chemically combined in a fixed ratio.
SHORT ANSWER
• What are trace elements?
FILL IN THE BLANK
• Each type of element consists of one type of
_____________. HINT-Smallest unit of matter
that still retains the properties of an element
MULTIPLE CHOICE
• What determines the properties of an
element?
A. Structure of atom
B. Arrangement of atoms within a compound
C. Structure of a molecule
D. The nucleus of an atom
SHORT ANSWER
• What are the three components of an atom?
FILL IN THE BLANKS
• The nucleus of an atom contains _________
and _______________
MULTIPLE CHOICE
• What forms a cloud around the nucleus of an
atom?
A. Protons
B. Neutrons
C. Electrons
D. Alpha particles
SHORT ANSWER
• Which two subatomic particles make up most
of the mass of the atom?
LIST
• List the subatomic particles and give their
charge.
MULTIPLE CHOICE
• What subatomic particle identifies the atom?
A. Proton
B. Neutron
C. Electron
D. Alpha particle
MULTIPLE CHOICE
• What subatomic particle determines how an
atom behaves?
A. Proton
B. Neutron
C. Electron
D. Alpha particle
MULTIPLE CHOICE
• What subatomic particle determines the
behavior of an atom?
A. Proton
B. Neutron
C. Electron
D. Both the protons and the neutrons
MULTIPLE CHOICE
• The atomic number is the number of:
A. Protons
B. Neutrons
C. Electrons
D. Both the protons and the neutrons
MULTIPLE CHOICE
• The mass number is the number of:
A. Protons
B. Neutrons plus electrons
C. Electrons plus protons
D. Both the protons and the neutrons
SHORT ANSWER
• A neutral atom has an atomic mass of 18 and
7 electrons. How many protons and neutrons
does it have?
SHORT ANSWER
• An atom with a negative 2 charge has an
atomic mass of 18 and 7 electrons. How many
protons and neutrons does it have?
FILL IN THE BLANK
• Two atoms with same atomic number but
different mass number are called
_______________.
TRUE OR FALSE
• Living things are able to distinguish between
radioactive isotopes and non radioactive
isotopes of same element.
MULTIPLE CHOICE
• Why are radioactive isotopes beneficial in
biology?
• A. They are easily detected an traced.
• B. They behave exactly the same way as their
nonradioactive isotope partners.
• C. living things don’t distinguish a difference
between radioactive and nonradioactive
isotopes of same element.
• D. All are correct
LIST
• List five uses of radioactive isotopes in
biology:
SHORT ANSWER
• How are radioactive isotopes harmful?
SHORT ANSWER
• What electrons determine the behavior of an
atom?
LIST
• List the number of electrons required to fill
electron shell 1, 2, and 3
TRUE OR FALSE
• If the valence shell is complete it has eight
electrons in it except for the first shell which is
complete with two electrons.
TRUE OR FALSE
• If the valence shell is complete the atom is
said to be reactive and unstable.
TRUE OR FALSE
• If the valence shell is not filled the atom is said
to be reactive and unstable.
TRUE OR FALSE
• If an atom is stable and unreactive it will
combine and form bonds with other atoms.
TRUE OR FALSE
• If an atom is unstable and reactive it will
combine and form bonds with other atoms.
SHORT ANSWER
• What are the two ways atoms can become
stable?
MATCHING
A. Valence electrons
B. Valence Shell
C. Valence Number
____ Number of electrons in outer shell
____ The Number of bonds an atom can make
____ The outer most electron shell
SHORT ANSWER
• An atom has an atomic number of eight. What
is its valence number and how many bonds
can it make?
SHORT ANSWER
• Why does an atom transfer an electron to
another atom?
SHORT ANSWER
• When there is a transfer of an electron from
one atom to another atom, what happens to
the charge on each atom?
SHORT ANSWER
• What do we call an atom with a charge?
VERY SHORT ANSWER
• Does the chlorine atom have the same
properties as its ion?
VERY SHORT ANSWER
• Are ionic bonds strong in the aqueous
environment of living things?
SHORT ANSWER
• Two ions with opposite charge will form what
type bond?
SHORT ANSWER
• Sharing of electrons is what type of bond?
SHORT ANSWER
• Why are the compounds of living things made
by combining CHNOPS atoms with covalent
bonds?
MULTIPLE CHOICE
• The number of bonds an atom can form is
equal to:
A. The number of valence electrons
B. The number of electrons needed to fill outer
shell
C. The number neutrons
D. The number of charges
A LONGER SHORT ANSWER
• Name & explain the difference between the
two types of covalent bonds.
MULTIPLE CHOICE
• Which molecule is the polar molecule?
A. C2H2
B. NH3
C. C6H6
TRUE OR FALSE
• Polar covalent compounds have areas with
partial negative charge and areas with partial
positive charges.
SHORT ANSWER
• What does electronegativity help us
determine?
Use Choices Below To Answer
questions On Next Slide
A. Atom on left side of periodic table, contains 1
or 2 valence electrons, and has low
electronegativity.
B. Atom on right side of periodic table, contains
6 or 7 valence electrons, and has low
electronegativity but higher than A.
C. Atom on right side of periodic table, contains
6 or 7 valence electrons, and has high
electronegativity.
Answer question below using info
from previous slide
What type of bond will you have if you combine
the following:
1. Combine A with C
2. Combine B with another B
3. Combine B with C
SHORT ANSWER
• A nonmetal bonded to a nonmetal will be
what type of bond?
SHORT ANSWER
• A metal bonded to a nonmetal will give you
what type of bond?
SHORT ANSWER
• A nonmetal with low electronegativity is
bonded to a nonmetal with high
electronegativity will give you what type of
bond?
SHORT ANSWER
• When matter is rearranged by the breaking of
bonds and formation of new bonds, what took
place.
SHORT ANSWER
• Give two reasons why chemical reactions
occur in cells all the time
TRUE OR FALSE
Energy is stored in matter and when matter is
rearranged in a chemical reaction energy may be
released or absorbed and stored in the new
matter formed.
MULTIPLE CHOICE
• All are true of biosynthesis reactions EXCEPT:
A. Build larger molecules from smaller
molecules.
B. Store energy
C. Are exothermic
D. Are anabolic
E. Example is photosynthesis
MULTIPLE CHOICE
• All are true of biosynthesis reactions EXCEPT:
A. Build larger molecules from smaller
molecules.
B. Stores energy
C. Are exothermic
D. Are anabolic
E. Example is photosynthesis
MULTIPLE CHOICE
• All are true of decomposition reactions
EXCEPT:
A. Break larger molecules into smaller molecules
B. Release energy
C. Exothermic
D. Anabolic
E. Example would cell respiration
TRUE OR FALSE
• The energy required to get a chemical reaction
started (in other words-need energy to get
molecules moving to collide with enough force
to break bonds) is called activation energy.
TRUE OR FALSE
• In a lab activation energy is supplied by heat
but cells must maintain homeostasis and keep
their temperature stable so instead of heat
they use enzymes to speed up reactions.
MATCHING
•
•
•
•
A. Reactants
B. Products
C. Law of conservation of matter
___ 1. Left side of equation-substances that
enter into chemical reaction
• ____ 2. Right side of equation-Substances
formed by change
• ____ 3. Matter is not created or destroyed
MULTIPLE CHOICE
• Chemical equations can tell us all of these
EXCEPT:
• A. Types of atoms
• B. Number of atoms
• C. Numerical proportion of atoms
• D. Position of atoms
• E. Reactants and products
TRUE OR FALSE
• In a chemical equation, the number before a
symbol represent the number of atoms of the
element and the subscript to the left of an
element indicates the number of molecules of
each substance.
MULTIPLE CHOICE
• It took 8000 Kcal of energy to break the bonds
of the reactants and 7000 Kcal of energy were
released in the formation of the products.
Overall, the chemical reaction was:
A. Exothermic
B. Endothermic
THE END
• YEA!!!!!!!!